Oliver "Tree" Nickell (not to be confused with Chicago rapper, Tremaine "Tree" Johnson) has a new EP, Demons, which has a very different cover of Radiohead's "Karma Police." The minimalist electronica plus marimba and strings provides a backdrop for an interesting style of singspeaking and a short rap verse. The video is also very odd, featuring violins and weird facial expressions. But it's definitely something different and way more interesting than the countless other covers of "Karma Police."
You can get Demons from Tree's official website or on iTunes.