Hmmm...
Try..
Om
Mono
Oliver Messian (composer, but still underrrated)
Grace Slick and the Great Society
Quicksilver messenger service
Sunn 0))))
Electric Wizard
Sleep
Burzum
Grand Buffet
Anything by KMFDM...(I just listened to them now and they suck, but they are tottally high school music)
Bad Brains
Fugazi
Laibach
Roots Nation