To answer this question: you might want to go
here for starters. I, especially, recall shows #1 and 2.
Then, excluding premieres or finales, there were those times when certain shows became
The Adventures of (Insert contestant's name). For example:
Match Game '7X: Carol Ware, Dee Davenport, Janet Finn (and that's just 1974!)*
Blockbusters: John Hatten, LaRae Dillman, Liz & Pat McCarthy*
Card Sharks: Milena (Can't spell her last name)
Jeopardy: Chuck Forrest, Leah Greenwald (from the 1980's)*
Tic Tac Dough: Thom McKee (naturally), Kit Salsbury*
Bullseye:Donna Burke*
I just now remembered the IGaS/TTTT panels pulling their "switcharoo" back in 1965; but then, I was only a toddler at the time.
There are others I can recall, but you get the idea.
Cordially,
Tammy
P.S. (*among other contestants)