Have you heard Pierce Pettis’ music? Rough voice, but full of power when he sings. Great crafting of lyrics. He’s been covered numerous times by the likes of Garth Brooks, Andrew Peterson, Sara Groves, and Joan Baez.
Personally, fame seems to have eluded his career. But he is well know and respected by many musicians (thus the number of people who cover songs he wrote). Good listening. You can download a couple of free songs through Paste Magazine.
(I felt this could go either under Good Music or Good Words, as he fits both. It ended up here.)