Are you looking for old school hiphop or hiphop that's current? Anyways I'll post old and new. Some are commerical hiphop artists now, but they old music is still classic of what hiphop is.
Common - A song for Assta
Atmosphere - Caved In
Brother Ali - Room with a view
Brother Ali - Picket Fence
Last Emperor ft Poetic & Esthero - One Life
Sage Francis - Crumble
Immportal Technique - 4th Branch
Sand People/Redshield - Growing Pains
Organized Konfusion - Invetro
The Roots - The Hypnotic
UGK - One Day You're here, Then you gone
Blu-Fly - Song of liberation
Blackstarr - Redefinition
Common - Retrospect For Life
Jake Lefco - Headphones
Common - G.O.D.
Chino XL alot of his songs are classics. The song that started him off.
Cyne is another group thats underrated their first few albums are dope.
(Cyne - nothing's scared)
T.H.U.G Angelz is another album that dropped in 2008 a few decent songs.
Median is also another good hiphop album of 2008
Percee P is probably another dope dude. His beats sound like the 90's hiphop but his lyrics are dope.
Binary Star another dope group.
Mc Juice Chicago hiphop artist, more of a battle rapper.
The list goes on and on... Let me know if you want more.