Mac Miller

I really like the Circles album. It stuck with me most of last year--a kind of fell good summertime album. Ironically for a posthumous release in January.
I'm not familiar with his other stuff, but I watched a tribute concert on Youtube and everyone seemed to say the same things about him: He was a huge supporter of he underground hip hop scene in LA and boosted a lot of careers without really taking credit, and that he was very humble and funny.