The band or album you mention wouldn't make me think of this, but since you mention nu-jazz, you might be interested to explore The Comet is Coming, from the London nu-jazz scene. For example, Summon the Fire:

Peter Banks and Sidonie Jordan made a great team!

"Everything Changes", "Someone Who Cares", "Shooting Star", "Sky At Night", "More Than Words", are fine songs. I love the jazz guitar as well. Always looking for this time of stuff - slow paces and proggy. Ambient. The only thing this song lacks are chimes!

PFM - Jet Lag. This gets quite funky in places and has a great 'vibe'.

Janko Nilović, a French multiinstrumentalist, arranger, and composer of Montenegrin origins, is known for his diverse musical style that blends various genres such as jazz, funk, and classical music. His album "Soul Impressions," released in 1975, showcases his innovative approach to music composition and arrangement. Entirely instrumental, the album features a fusion of traditional soul and funk elements with more experimental and proggy sounds. 

Nilović incorporates complex rhythms, odd time signatures, and intricate melodies into his compositions, which are characteristic of progressive music. Nilović’s use of unconventional instrumentation, such as Moog synthesisers and exotic percussion instruments, adds a progressive touch to the album. The incorporation of these elements demonstrates his willingness to push the boundaries of traditional music genres and explore new sonic territories. 

Overall, "Soul Impressions" by Janko Nilović can be considered a pioneering work that incorporates progressive music elements alongside soul and funk influences, making it a unique and imaginative album in the realm of music from the 1970s.

Yeah, nasty aint it? Apologies, couldnt get a smaller version to load.. 

Any of their lps would suffice- the only entirely 'white' act on Mowtown's roster.. They did some longer tracks including a side-long piece with organ, flute, some brass, good guitar over a soulful bass and vocals, quite 'jammy' in places..

But, yeah, could have done without seeing that...

I always thought the Lenny Kravitz song "Believe" was rather proggy and that and the whole album it's from Are You Gonna Go My Way has lots of soul and eclectic elements but I wouldn't really call it any kind of prog no matter how much I personally like it. 

Check out his first album Let Love Rule. 

What immediately came to mind for Prog with funk and soul qualities is Magma for its late 70s and  through 80s period, as well as its latest Karthel which draws on its late 70s era, and music by the Magma related Christian Vander project Offering.  So from Magma, Attahk (1978), the Bobino 1981 concert album, Merci (1985) and Kartehhl (2122) for soulful jazz/funk qualities.

Parliament/Funkadelic has been mentioned and I would put certain albums in at least the Prog related/ adjacent universe.  Based on my listening, from under the Parliament name, I found the debut Osmium (1970) to be most Prog relevant, and from Funkadelic, the first few albums.  In the early 70s, P. Funk (Parliament-Funkadelic) was making really interesting and great music.

Magical World - a video which makes the dystopian world of Stalinism look almost appealing.

As he was mentioned, love Janko Nilovic, by the way. His Rythmes Contemporains is one of my favourite albums.

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I did not notice anyone mention Demon Fuzz - Afreaka!.

Electric Ladyland or Band of Gypsys. Pick one. 

More progressive funk than just about anything out there. Just ask George Clinton. 

Space-soul music is a unique and eclectic fusion subgenre that combines elements of space-rock, soul, funk, and jazz to create a cosmic and soulful sound. "Space Is the Place," the album by Sun Ra and His Astro Intergalactic Infinity Arkestra, is an example of a space-soul album from the early 1970s that was fairly progressive.

This album by Sun Ra, a pioneer of afrofuturism and avant-garde jazz, embodies the essence of space-soul music with its blend of free jazz improvisations, cosmic themes, and spiritual undertones. "Space Is the Place" features a mix of avant-jazz, soul music, electronic sounds, and otherworldly compositions that transport listeners to a celestial realm.

Over 21 minutes long, the title track, featuring female vocals, is a quintessential example of progressive space-soul music from 1973.

Michael Kiwanuka's s/t record is one of the contemporary progressive soul albums from the UK. Released in 2019, "Kiwanuka" is the third studio album by this British singer-songwriter, who is creating a fresh and innovative take on the soul genre. The album blends elements of soul, folk-rock, and psychedelic influences to create a unique and experimental sound that pushes the boundaries of traditional soul music. "Kiwanuka"'s exploration of themes such as identity, self-discovery, and societal issues further adds depth to its experimental nature, making it a standout example of contemporary progressive soul music from the UK. The album received critical acclaim for its bold experimentation and introspective lyrics, solidifying Michael Kiwanuka as one of the leading figures in the contemporary UK music scene.

Michael Kiwanuka’s distinctive vocals, combined with the innovative production on songs like "Hero," showcase his willingness to explore new sonic territories within the realm of soul music.

If we're discussing contemporary progressive soul, we can't leave out Anaiis. A French-Senegalese singer-songwriter based in London, England, Anaiis (stylized anaiis) is noted for her eclectic style, multilingualism, singing ability, and thoughtful lyrics.

Anaiis obviously draws inspiration from a wide range of musical genres, such as soul, R&B, sophisti pop, ambient, neo-psychedelia, and electronic music; thus, her music blends various genres, styles, and influences to create a unique sound that resonates with audiences worldwide.

This fusion of styles creates a dynamic and innovative sound that sets her apart in the music industry.

Being of French-Senegalese descent, Anaiis infuses her music with elements of both cultures. This cultural fusion adds depth and richness to her songs, incorporating traditional Senegalese rhythms and melodies alongside modern Western influences.

Anaiis is known for her introspective and thought-provoking lyrics. Her songs often explore themes of identity, love, empowerment, and social issues, reflecting her personal experiences and worldview. This lyrical depth adds another layer of complexity to her music.

Anaiis' song "Woman" ("Darkness at Play," 2019) fits into the progressive soul genre for several reasons. Firstly, the production of "Woman" incorporates a mix of electronic elements, an ambient-like atmosphere, and traditional soul instrumentation. The song features a unique blend of synthesisers, drum machines, and live instruments that create a dreamy yet experimental sound.

Secondly, the lyrics of "Woman" address complex themes related to womanhood, empowerment, and self-discovery. Anaiis' introspective and thought-provoking lyrics add depth to the song and resonate with listeners on a personal level.

Lastly, "Woman" showcases Anaiis' willingness to experiment with different musical styles and sounds. The song’s unconventional structure, use of vocal effects, and dynamic shifts demonstrate her artistic versatility and willingness to push boundaries within the soul genre.

"Woman," a live rendition.

The best examples, IMHO, are on Something/Anything, Todd, A Wizard/A True Star. The Last Ride is one of my favorites.

DOUGLAS FIR      The tallest trees in the forest, being one of the most soulful psych bands you're ever likely to hear, sounding like a curious cross between Blood, Sweat & Tears and The Doors, but better than both. Yes, really!! Douglas Fir are from Portland in Oregon - a US state famous for its Douglas Firs, funnily enough. 

 1970: Douglas Fir - Hard Heartsingin' -  https://www.youtube.com/watch?v=SptrJDSEuos" rel="nofollow - http://www.youtube.com/watch?v=SptrJDSEuos

Indirectly I think that the rise of Prog encouraged artists such as Isaac Hayes and Nina Simone, especially in concert and live records, to perform far longer pieces and to generally go beyond the standard 3 minutes structured tracks. But the influence of Jazz improvisation can not be understated either. 

 Sure, The Temptation's psychedelic soul might not be soul prog, but the Temptation's psychedelic era resides next door to prog soul.