Thank God "Rocky Top" isn's a folk song (Felice and Boudleaux Bryant, 1967?)I've never liked "Old Joe Clark", "The First Time Ever I Saw Your Face", or that one about the Goodnight-Loving Trail, which doesn't really make much sense. "Home on the Range" can go and so can "Ground-Hog".
I like the Hedy West version of "500 Miles", with the plucky banjo accompaniment (not my favorite method of banjo-playing by any means, but it has more life and less self-pity than some other versions).