Who are some good Christian folk artists, or acoustic artists?

I have been searching for awhile, but sometimes it is hard to find Christian artists that play acoustic and folk music without them being completely worship on their albums. I have found Sara Groves, who I enjoy a lot, but I strive to find more than one artist. Jon Foreman is another that I found and have loved ever since finding Switchfoot. If you could just tell me some artists that play folk/acoustic and have deeper songs and artistic lyrics I would thank you dearly.