Levon Helm was (he of course played Sissy Spacek’s father in Coal Miner’s daughter), Dwight Yoakam (Sling Blade), and Billy Bob Thornton is the drummer in a Pop/Rock group. Loudon Wainwright III has done some acting, as has Sting. Jeff Goldblum is a very accomplished pianist. And Jeff Bridges did a great job of playing a Country singer in Crazy Heart, and had a solo album a coupla years ago.
