I don't think I can say, while I listen to a fair amount of Hip-Hop/Rap, that I like any band/group/person a great deal. For example, I'd listen to 5 albums by NaS, and find perhaps three or four songs that interest me. Even less with The Game, Jay-Z, and all your popular Hip-Hop artists. I'd claim to be a fan of JMT, but their lyrics are horrid. There are moments I wish death upon Vinnie and whoever else writes that excuse for lyrics, riddled with racism and bigotry.
Songs I personally enjoy (regardless of lyrics, in the aforementioned case) in general:
The Roots - Don't Feel Right
Outkast - Bombs Over Baghdad
Talib Kweli (Feat. Mary J. Blige) - I Try
NaS - Black Republican
Outerspace (Feat. Chief Kamachi) - Divine Evil
Outlandish - Walou (Rishi Rich Remix)
Michael Franti - Everyone Deserves Music (Can be loosely classified as Rap/Hip Hop/R&B)
The Game - Put You On The Game
Jedi Mind Tricks - Me Ne Sbatto
Jay-Z - Heart Of The City (Ain't No Love)
Jay-Z - Dirt Off Your Shoulder
Sage Francis - Slow Down Gandhi
Sage Francis - Bridle
Jurassic 5 - Running In A Cyclone
Gym Class Heroes - To Bob Ross With Love
Fort Minor (Feat. Mr. Hahn) - Out The Back
Ratatat, for those familiar, did two remix CDs, covering several very good songs. Some notable ones are KanYe West - Diamonds, Memphis Bleek - Alright, Beanie Sigel & Jay-Z - Glock Nines. I'd suggest checking out both, unless you have a deep hatred for "Eletronica".