What is some outstanding lyrical (conscious) rap artist?

By this I mean people that are highly intelligent and elevated in there lyrical prowess. To give a good example of what I am talking about, anything ranging from Lupe Fiasco to Immortal technique. Some others are M F DOOM, talib kweli, Raekwon, Nas, Common, etc... If you know anyone that is somthing close to mind blowing with lyrics please tell me there name, and any specific songs.