Here's my list, I actually posted my top 50 emcees/rappers on my fb earlier this year, some I based my order on their prime years and where they are now, with only a few new/recent kats making an appearance; anyway here is just the top ten.

(1)Pharoahe Monch
(2)Nas
(3)KRS-One
(4)Elzhi
(5)Planet Asia
(6)Royce 5'9"
(7)Busta Rhymes
(8)Redman
(9)Chris Rivers
(10)John Robinson aka Lil' Sci