wu tang, nas, immortal technique, pharcyde, organized konfusion,deltron, hyroglyphics, (old) outkast, papoose, acey alone, diolated peoples, krs one, digital underground, grand puba, bootkamp click, mottormouth, talib kwali, mobb deep, (old) cassidy, big l, camron, kool g rap, jedi mind tricks, tribe called quest, and many many more.

alot of these are no longer undetground, but were when i first started liking them