I've been listening to mandolinist Matt Mundy (on 3 tracks of Bela Fleck's Tales From The Acoustic Planet Vol 1, and on Aquarium Rescue Unit etc.). He is a harmonic genius! I have fallen in love with his playing.
He doesn't seem to play music at all anymore, and hasn't for years. I'm pretty sure he IS alive, so what's his excuse? With talent like his, it's a crying shame not to put it to use!