Just lately? Lynn Miles.

Other favorites of longstanding: Bob Dylan, Leonard Cohen, Mary Chapin Carpenter, Al Stewart, Jackson Browne, Buffy Sainte-Marie, Joan Baez (who did write some great stuff, although she's known more for doing cover tunes), Emmylou Harris, Joni Mitchell, Ian Tyson, Tish Hinojosa, Gordon Lightfoot, Willie Nelson.

And I like my own songs a lot. I'd have to, being very close to them.