By far the Tindersticks first then Sufjan Stevens, Phil Roy, Neko Case, Ben Folds, and undeniably Ryan Adams.
Other greats are Kim Richey, Jack Johnson, Gandalf Murphy and the Slambovian Circus of Dreams, The Decemberists, and Death Cab For Cutie.
So sad to see the emotionless audiofidels like Diana Krall mentioned. Oh Elvis, what have you done?