I like Sharon Cobb’s example, so I’ll play along.
Normally, taking an unfinished, unreleased Bob Dylan chorus and finishing it out with your own verses and melody would be considered the height of arrogance and folly. But for some reason, Old Crow Medicine Show’s “Wagon Wheel” is simply soul-satisfying:
This song just makes me happy. Maybe it’s that Ketch Secor borrows heavily from Dylan’s nasal-whiny style. Perhaps it the 1-5-3m-4 progression that just screams “blissfully meloncholy”. BTW, it’s the same progression as Bruce Springsteen’s “I’m goin’ Down”, and about a million other songs.
But anyway, enjoy. And remember: if you die in Raleigh, at least you will die free.
UPDATE: I just realized, it’s a 1-5-6m-4 progression. In C it would be the A-minor. Although the E-minor would be an interesting touch, it would totally change the feel of the song.