MF DOOM is the shit. He has many aliases and has had many famous projects, but where ever he is and whom ever he works with, amazing hip-hop is produced. Known as KMD, Viktor Vaughn and obviously DOOM, he also was also 1/2 of Madvillian and Danger Doom, both projects that set him with one producer. I know I've missed many other projects of aliases of DOOM, but you get the picture that he produces a lot of music.
As one of my friends said "DOOM has a whack flow!" and he meant it in the best way possible. Instantly recognizable, the odd flow, tone, lyrics, and the subtle and outstanding word play of DOOM makes for amazing music and an amazing listen every time. Listen to each song more than once to find all the jokes and plays on words.
Here are some examples of his music.
First and most famously, All Caps, produced with Madlib as part of Madvillian.
Sofa King, produced with Danger Mouse (producer in Gnarls Barkley) as a part of Danger DOOM
Deep Fried Frenz, From Mm...Food, which is just an MF DOOM release.