living sacrifice's self titled is decent thrash reminiscent of slayer
deliverance dwelves into speed metal on certain albums
trouble's psalm 9 thrashy doom ala no one and they rule
ashen mortality is good death doom ala my dying bride
paramaecium is.. uh like death doom with funeral doomish atmosphere (on their first album <-- this one i actually recommend, it's excellent) but with an emphasis on the riffing so it's not as droning as typical in that style
crimson thorn / mortification's scrolls of the megilloth is decent death metal
extol's undeceived is melodic death, with some outstanding tracks, but it's also a very inconsistent disc
horde is good "unblack" ala dark throne - the other important bands in the "unblack scene" being antestor (started out as blackened doom and now play melodic black, their old stuff is decent and i don't like their new stuff), and crimson moonlight who play melodic/brutal black
nothing near 'essential' but there is some decent albums that people intentionally overlook
there's another good speed metal band which i can't recall... i'll probably make another post after my mid-term