I thought of Bob Gibson yesterday for the first time in years. I had never heard of him until one day around 1980 when we went into Greenwich Village to see Tom Paxton. Out came the opening act: a plump, fifty-ish guy in a jacket and tie. He solemnly placed the jacket on a chair, picked up a guitar, and sang: "Yes, Mr. Rogers, I'm living in sin with your daughter..." and he owned the room.
Everybody in the folk movement borrowed from Gibson. With (Bob) Hamilton Camp he made some of the coolest albums in folk. He discovered Joan Baez (which he said was like trying to take credit for discovering the Grand Canyon...SOMEONE was going to notice it); he tried to talk Phil Ochs out of writing political stuff and Ochs took the tune he played as he talked and wrote "One More Parade." He was probably the best interpreter of Shel Silverstein songs (LIke Yes, Mr Rogers, and the Gibson-inspired "LIving Legend").
Can't find either of those on Youtube, so here he is with Gibson and Camp on what looks like a cable access show, doing a Silverstien classic. Great harmonies.