Look through the related tracks, there's plenty of that guy's awesome-ass sheeit all up in that mug. Dude's got a bloated Myspace page, but I ain't linkin' that shit. Google 'Atma rapper' if you must.
Next up: Childish Gambino, whom you may know as Donald Glover, aka the black dude on Community whose name escapes me at the moment, aka part of the legendary Derrick Comedy team.
Go down and download Pointdexter. It's fooking hilariously awesome, and one song even features mc chris.
Edit: Speaking of mc chris, his last couple of albums are fucking fantastic:
