When the guitarist Marc Ribot played a solo concert in Basel a couple years ago, the most surprising part of the show (given that he is mostly associated with jazz, despite his affiliations with Tom Waits and Elvis Costello, among others) was the folk music that he played. With his unique singing and his equally unique way of accompanying himself on acoustic guitar, he seemed to me to be ready to play folk songs at folk-music festivals, where he might well overwhelm audiences with the power of his performance.

He still has not released an album of folk songs, but you can check out "The Dying Cowboy" from an in-studio performance at KEXP (the University of Washington) to get an idea of what makes his folk music so special.

Marc Ribot, "The Dying Cowboy"