Ever since I heard his contribution to the soundtrack of Samurai Champloo, I have been listening non-stop to Nujabes. His main genre was hip-hop, but he himself didn't rap, he just made the music. He also did a mix of jazz and hip-hop that is amazing to say the least. Unfortunately, he was killed in a car crash at the age of 36.
Here are a couple of my personal favorites of his:
Peaceland,
Spiritual State, and
Flowers. Enjoy.