Lots in popular music..offhand, Lou Reed and the Red Hot Chili Peppers, and of course Adam Yauch of the Beastie Boys (now deceased) I know practice Tibetan Buddhism.
There is a ton of underground drone/noise music that is Dharma Influenced, sometimes it borders on appropriation, but it's interesting in that often it's an attempt to use ritual sound in similar method similar to those in Vajrayana, though i'm sure it's validity would be questioned by plenty of traditionalists, this is different from a lot of Dharma music where the lyrics are where the Buddhist content often is. Here's one of my favorite projects:https://soundcloud.com/ytstlabs
And since it was mentioned, ahem....here's my bandcamp and soundcloud sites, fair warning..plenty of people don't consider it music, and they might be right!https://soundcloud.com/zach-zinnhttp://zachzinn.bandcamp.com/
I think if we really spent some time on it, we could come up with a good size list of Dharma musicians across genres, by and large since most Buddhists don't usually plant a flag saying "Hey look everyone, i'm religious, here's what I believe", you have to look closer at the artists themselves to know what's going on. IIRC there were a few Buddhist punk bands, and probably still are too..but the memory of who they were has faded.
I don't remember that they ever came out and said it directly, but I always suspected that Fugzai (for those of you who might have liked 90's post punk type stuff) were Buddhist, or Buddhist influences at one point or another:http://www.youtube.com/watch?v=maM9BCQS4n4&feature=kp
See if you think the lyrics to this song could be anything but Dharmic heh, if they aren't, they sure are on the same page.