I know of a radio station in Hagerstown, MD (AM 1240 WJEJ) that plays quite a few non-hit Gordon Lightfoot songs (especially in the evening). Here's a link to their website:
http://www.wjejradio.com/ where you can listen to them live (just click on the radio in the upper left hand corner).
Besides Gordon, they also play a nice mix of music (both vocals and instrumentals) from the 50's, 60's, and 70's, plus a few current ones. There's rarely an evening goes by that they don't play at least one Gordie song- and not just the hits!