Nathan Lee.  Love almost every soulful song of his.  Best one: El Diabolo Y El Angel -- it's a song where he reveals that he is "rainbows and razorblades" and every other contradiction.  I think he's Christian, because I've heard a few songs that seem to indicate it, but I can't find proof.  His music is not dark, but satisfyingly reflective of the realness of life and humanity, and all the mistakes and wonders that come with it.  Give him a listen.