black emo
Conscious hip-hop (Common, Talib Kweli), R&B, Wu-Tang Clan, and the Backpacker culture can all be considered black emo aka nerd rap.  Purveyors of Black emo are African-American musicians who make music about for the bling, benzes and bitches, but to propoke thoughtful introspection on behalf of the listener about the state of the Black community.  They are often Black Nationalists.  Kanye West can marginally be put into this genre.
Dead Prez, Common, Mos Def, can all be included in the black emo genre.