Ok first of let me start by saying Dr Dre is over the hill. If u have listened to anything other than the beats on 2001 u would know Dre hasnt the abillity to make dope rhymes. Still Dre wast written by Jay-Z so nothing of it came from Dre himself. Besides he appears so little on the record that I dont understand why it havent become a compilation.
Well enough about Dre.
If I had to choose one of the MC's up there it would be 2Pac because of the depth of his rhymes and so on...
But I didnt choose any of 'em. Like Skunk said Chuck D is definately one of the all time greats. Other MC's more worthy of being on that pole are Common, Mos Def, Talib Kweli, Dead Prez, Atmosphere, Inverted Monk and so on. Although there aint anything wrong with the MC's listed above they dont even come close to the heart and soul of those MC's less exposed.
Its the underground u will find the really phat MC's not in the pop-charts!