In no particular order i'll begin proceedings with...

1. 2Pac
2. Eminem
3. Nas.
4. Jay-Z
5. 50 Cent
6. The Notorious B.I.G

1. rakim
2. melle mel
3. public enemy (chuck d)
4. a tribe called quest (q-tip/phife dawg)
5. gang starr (guru)
6. big daddy kane
7. slick rick
8. run dmc
9. ll cool j
10. krs-one
11. roxanne shante
12. de la soul (posdunous)
13. cypress hill (b-real)
14. redman
15. wu-tang clan (method man/gza)
16. nas
17. epmd
18. mc lyte
19. beastie boys (mca)
20. mos def

Public Enemy
KRS 1
Rakim
Eminem
Dizzy Rascal
LL Cool J
Run DMC
Beastie Boys
Busta Rhymes
Snoop Dogg
Ice Cube
Ice T
Mos Def
Scroobius Pip
Wu Tang Clan
Roxanne Shante
Slick Rick
Cypress Hill
D12

1. Lauryn Hill
2. 2Pac
3. Nicki Minaj
4. Notorious B.I.G.
5. Angel Haze
6. Azealia Banks
7. Wyclef Jean
8. Kanye Wedt
9. Jay Z
10. Foxy Brown

I haven't really been listening to my Hip Hop records and CDs much over the last couple of years as I have been mostly investigating older things but here are some favourites:

Big L, Kool G Rap, Vast Aire, Chuck D, MF Doom, Kool Keith, Schoolly D, C-Rayz Walz, Edo G, Count Bass D, Illogic, KRS-ONE, Scientifik, Immortal Technique, Paris, Raekwon, GZA, MF Grimm, Asheru, Guru, Ghostface Killa, MC Solaar, Kohndo, Aceyalone, Rodney P., Roxanne Shanté, Bahamadia, Murs, Busdriver, Rah Digga, Jean Grae, Del Tha Funkee Homosapien, Akinyele, Biz Markie, Just Ice