I'm being liberal with my application of genre here, so as to avoid numerous prefixes and suffixes resulting in twelve hundred seperate categories.
Black: Ved Buens Ende, Dodheimsgard, Solefald, Bathory, Belketre, Mutiilation, Emperor, Kailash, Burzum, Ulver (first three), Keep of Kalessin, Arcturus
Death: Decapitated (first two), Cryptopsy, Morbid Angel (with David Vincent), Ripping Corpse, Atheist, Cadaver, Edge of Sanity, Hollenthon, Zyklon (first album)
Thrash: Coroner, Kreator (early), Celtic Frost, Forbidden, Heathen, Watchtower
Heavy/Power: Blitzkrieg, Helloween, Diamond Head, Angel Witch, Cloven Hoof, X Japan