Sermon, deathmetal is old school too bro, where you been? Morbid Angel, Deicide, Suffocation, Napalm Death, all peaked in
the early 90's.
I have Effigy of the Forgotten, I popped it in the player a couple
weeks ago, and honestly it bored me. It shows it's age.
Testament were bad asses in the late 80's. I still think The New
Order (I think that's the name), was a classic recording. They were one of the heaviest bands around at that time. Saw them twice on that tour, but I haven't cared for much they've done since, and their sound has gotten old somewhat.
Old School still cool enought to be in my changer now:
Possessed- Seven Churches
Slayer- Hell Awaits
Death- Leprosy (Left to Die perhaps the best speed song ever recorded IMO).
Destruction- Eternal Devastation.