MADLIB, Madvillian, loop Digga, Quasimoto, etc. Madlib literally has dozens of "a.k.a.'s" mainly because hes so crazily diverse.  Right now I'll be showing out his reggae. This album contains mixes of some of the best underground, non-main stream reggae songs.
Also Madlib loves the reefer!!.  4 of 12 Medicine show #4: 420 chalice All Stars.