all right, glad I found this thread.......so this is my bread and butter style in metal, and I noticed that quite a few of the essentials are missing from this thread, so I will try to suggest some of my favorites:
7for4 (heavy fusion)
Sieges Even (the best best best technical prog metal band ever!!!)
Abigor (tech industrial avant garde black metal)
Altered Aeon (tech thrash death metal)
Anacrusis (tech thrash)
Anata (tech death metal)
Annon Vin (tech prog metal)
Arcturus (avant garde dark metal)
Arsis (tech death)
ATROX!!!!!!! (avant garde greatness!!!)
The Axis of Perdition (great, weird, dark ambient/industrial black metal)
Mick Barr (avant garde flying mosquitoes of death)
Believer (tech thrash)
Blut Aus Nord (awesome dissonant black metal)
Borknagar (progressive extreme)
Cadaver/Cadaver Inc. (tech thrashy black metal)
Carnival In Coal (avant garde greatness)
Coroner (best thrash band ever??)
Covenant (melodic black metal)
Cynic
Deadsoul Tribe (buddy lackey of Psychotic Waltz- new band)
Deathspell Omega (exceptional, progressive, avant garde black metal- my all-time fave in the genre)
Diabolical Masquerade (tech death, avant garde)
Depressive Age (tech death)
Depresy (tech death)
Disharmonic Orchestra (old school tech death)
Dodheimsgard/DHG (avant garde industrial black metal)
Dog Fashion Disco (avant gumbo metal- a la faith no more/Mr. Bungle)
Electroction 250 (tech thrash- all over the place metal)
Emperor (the godfathers of modern 2nd and 3rd wave black metal)
Enslaved (mid era is essential for progsters who like it heavy- progressive black metal)
Ephel Duath (started as great progressive black metal- turned into jazzy, jarring, dissonant avant garde metalcore???? highly highly highly recommended!)
Extol- (tech black metal to start, tech thrash, newer stuff is very poppy and not as good)
Fleurety (avant garde black metal)
The f**king Champs (tech thrash instrumentals)
Gorguts (brilliance, no matter how you slice it)
Gorod (tech death)
Gory Blister (tech death)
Helstar (tech thrash greatness)
The Human Abstract (melodic tech deathcore)
illogicist (new album feat. Marco Minneman- tech death)
Into The Moat (dillinger escape plan multiplied times crazy)
Kadenzza (plain shred weirdness)
Kreator (tech thrash-to a degree)
Lengsel (black metal progressive)
Luciferion (tech melodic death)
Manes (avant garde black metal/post black metal)
Martyr (the best tech death, post-thrash, heavy fusion band to ever exist!!!!!!)
Mekong Delta (tech progressive thrash- huge fans of Mussgorsky)
Mirrorthrone (prog black metal)
Lux Occulta (avant garde black metal)
Korova/korovakill (avant garde thrashy blackened wierdness)
Mutant (Theory In Practice side project- black metal)
Necrophagist (tech death)
Neglected Fields (tech death)
Non Human Level (darkane side project- tech death)
Obliveon (tech thrashy death)
Oxiplegatz (avant garde death metal)
Peccatum (avant garde post black metal)
Protest The Hero (tech thrashy death)
Psychotic Waltz (the best?)
Psychotogen (tech death)
Psycroptic (tech death)
Psyopus (spazzcore death tech)
Ram-Zet (avant death)
Realm (tech thrash)
Reflux (tech deathcore)
Rope (avant garde dark jazz)
Sadus (tech thrash/death)
Sceptic (tech death)
Scuptured (progressive avant greatness)
Scholomance (awesome tech death with keys)
Sigh (avant black metal/thrash)
Sikth (tech death a la Meshuggah)
Octopus (tech death a la Meshuggah, only much, much, much better)
Solefald (avant garde post black metal)
Spastic Ink/Blotted Science/Ron Jarzombek
Watchtower (tech thrash- one of the best ever)
Tiamat (only Wildhoney- progressive death metal/doom)
Trepalium (tech death)
Devin Townsend (progressive metal)
Ulcerate (tech death a la Gorguts)
Spawn Of possession (tech death)
Virus (avant garde post black metal)
Vuvr (avant garde strangeness that is fantastic)
Winds (progressive avant garde metal)
Wintersun (tech death)
that oughta keep you busy for a while.....