Most significant was Reverend Joseph Lowery. Sat next to him on a flight from ATL to Memphis and we talked for the entire flight. This was maybe 25+ years ago and I still remember discussing politics, religion, Martin Luther King and a bunch more.
Elliot Gould, strangest person on my list, sort of "from another planet" but very entertaining. about 5 minutes in a hotel lobby in Cleveland
Billy Graham at Southern Baptist Convention in New Orleans, sometime around 1980 or so. Very gracious maybe 2-3 minutes
Feddy "Boom Boom" Cannon (Palisades Park his big music hit) Pick him up at Jackson airport for a gig he had in town
Clint Walker: Another Jackson airport pick-up. I was with my Grandfather who was commissioner of AG. Walker was coming in for Dixie National Livestock show and Rodeo
Tom Lester, Bruce Weitz (Mick Belker on Hill Street Blues) very down to earth guy
Harry Belefonte, Denny Crum, Emory Bellard