all artists on QN5 are shit hot (cunninlynguists, pack fm, immortal technique...)
the roots
tech n9ne
talib kweli (one of the best lyricists ever)
mos def
slug
eyedea
brother ali
c-rayz walz
apathy
celph titled
jedi mind tricks
people under the stairs
looptroop

there is alot more, if i still had my old pc id be able to post a couple of hundred undergeround albums, fuckin viruses
i posted some more in another thread somewhere, might be some more there