1: Dr. Dre
2: Eminem
3: Game
4: Tupac
5: Notorious B.I.G.
6: Nas
7: Warren G.
8: Jay Z
9: Andree 3000
10: Will.I.Am

Too Short
DMX
Dr. Dre
Eazy-E
Eminem
Ice Cube
Tupac
Snoop Dog
Beastie Boys
Akon

These picks will probably date me and if I get tagged with the "old school" label, then so be it.
Back in the day, these were my favorites...

Grand Master Flash & The Furious Five
Public Enemy
N.W.A.
Eric B. & Rakim
Run-D.M.C.
Ice Cube
De La Soul
The Beastie Boys
Snoop Dog
Digital Underground

Based on raps not lyrics
1. Eminem
2. Mr. Porter
3. Dr. Dre
4. Royce Da 5'9"
5. Bizarre
6. Rage Against the Machine
7. 50 Cent
8. Ludacris
9. Snoop Dogg
10. Slaughterhouse

I would say in no order:

Nas
Andre 3000
2Pac
Ghostface Killah
Chuck D
Rakim
Ice Cube
Notorious B.I.G.
Big L
Black Thought

Good list. Quite similar to mine, I've never got Immortal Technique though. Obviously skilled but too much of a try-hard for me, he preaches way too much to the point where it's not even fun to listen to anymore.

2pac should be there

Top 10 going into 2013
 

This might be quite controversial fam, but here we go:

1 NaS
2 Tupac
3 Slick Rick
4 Eminem
5 Jay-Z
6 John Cena
7 Dr Dre
8 Royce da 5'9
9 Krept & Konan
10 Lowkey

I think Nas is a popular choice, the Don! Don't ask why Cena's there XD

1. Earl Sweatshirt
2. Ghostface
3. Kanye West
4. Jay-Z
5. LIL Waynes Guitar
6. StraightFace
7. Jay Electronica
8. Kendrick Lamar
9. Lil Waynes purple drank
10. Macklemore

Check me out
 

im not looking to be the best but just make good music in general
check me out on youtube . com / Realonenation