I'll be discussing an artist I've known for a while and still has me listening almost daily, partly due to his experimental nature with music and songs that vary not only in composition but also the way the message comes across. Dan Black, a British wonky pop artist who I first heard on a song named "Symphonies" that had Kid Cudi and for a while I viewed it as his song because of the quality of the song, and thought Dan was featured, but as I began to look into his music, I found that it was him that produced the entire song and Cudi featured. This drove me to begin looking at the rest of his music and found his songs varied great from slow, steady beats infused with acoustic guitar with calm lyrics to upbeat songs with fast lyrics and various covers and other experimental songs and visually interesting music videos.
 Symphonies ft. Kid Cudi

http://www.youtube.com/watch?v=uWWG75lLemA

 This is one interesting considering it's composed from covers and samples from Britney Spear's "Gimme More," Madonna's "Into The Grove," and Kate Bush's "Cloudbusting."
http://www.youtube.com/watch?v=aDMb00qtChg

An example of oneof his more techno-driven songs.
http://www.youtube.com/watch?v=e9QvyTZ_kZQ&feature=related

cover of Dizzee Rascal's "Stand Up Tall"
http://www.youtube.com/watch?v=8f1y8c9moZw

Use of acoustic guitar over slow beats
http://www.youtube.com/watch?v=NWkWVYKOthQ&feature=related