Quite a few.
From Sesame Street, Loretta Long, Bob McGrath, Carroll Spinney, Sonia Manzano (who was actually not really nice, what a shame),
Christopher Cerf, Fran Brill, Stephanie D'abruzzio, and some geek named Frank Oz. Has delusions of becoming a director.
In music: 60's artists Roger McGuinn, Chris Hillman (the Byrds),
Jorma Kaukonen and Jack Casady (Jefferson Airplane), John Mayall (who had a group called the Blues Breakers and featured this punk named Eric Clapton), Arlo Guthrie, Richie Havens, and Carlene Carter, whose daddy was Johnny Cash.
Someone else I met in passing, a coworker of mine invited me to a block party. He introduced me to this girl about my age named Dana Owens, you might know better as Queen Latifah.
Comedians: George Carlin, Tim Allen (before Home Improvement, Buzz Lightyear, and Santa Claus), Jimmie Walker, and Jeff Dunham (who just introduced Walter, but Peanut is still my favorite).
Check him out at Jeff fah fah Done Ham Dot Com!