Roy Wood: his first solo record, “Boulders,” is quirky, idiosyncratic and stylistically all over the place, as is the norm for him. The two tracks closest to prog are, IMO, Nancy Sing Me a Song and Dear Elaine, both of which would have fit in on the first ELO album.
Cream: “Wheels of Fire” has several: As You Said, White Room, Passing the Time, Pressed Rat and Warthog, Those Were the Days and my single favorite Cream tune, Deserted Cities of the Heart. From “Disraeli Gears”: Dance the Night Away, World of Pain, Blue Condition. From “Goodbye”: Badge, What a Bringdown, Anyone for Tennis.
But nooo, they can’t even be considered proto-prog around here. Waaaaa……
Moving on…
Al Stewart: Roads to Moscow, Terminal Eyes, Nostradamus, Merlin’s Time, Running Man, On the Border.