Most of what I was going to say has been mentioned but…
If you like DOOM/Quas, obviously Madvillainy, Dangerdoom, The Unseen, The Further Adventures of Lord Quas.
Mos Def, Talib Kweli. As a pair (Blackstar) and individually.
Wu Tang Clan, 36 Chambers is one of my favourite ever albums, just amazing. Also check out Ghostface’s Supreme Clientele and Apollo Kids. Raekwon (and Ghost’s) Only Built 4 Cuban Linx is good too.
Liking M.E.D. at the moment, in fact check out Stones Throw Records, loads of good stuff there.
Jay-Z, The Black Album needs a mention.
Kanye West, a lot of people don’t like him, but I can pretty much listen to all of it, College Dropout and My Beautful Dark Twisted Fantasy especially.
Wow, long post.