Common and Kid Cudi

Common is a highly talented hip hop producer and was a heavy influence on Kanye Wests' earlier albums. His original beats and relaxed take on hip hop ensures his music can be enjoyed as chillout as well as big club beats.  I

Common - Be 

Kid Cudi is another hip hop contributor who uses relaxed drawn out beats and relies heavily on 808 drum machines to add that heavy bass effect, his song below is probably best known as that which featured in Project X, this, the original has the turbocharger removed and is an excellent song to relax to especially the digital effects provided by Ratatat who produces the song.

Kid Cudi - Pursuit Of Happiness ft. MGMT

Here is another from Kid Cudi featuring an unlikely contribution from Vampire Weekend. 

Kid CuDi & Vampire Weekend - Cudder is Back