I always loved Richard Dawson (he had a small role in Mash, I believe).
He was amazing on Match Game (in the 70s) and the original, the best Family Feud (with respect to Ray Combs RIP).
I was a nerdy kid who would watch Game Show Network and google (then it was excite.com for a search engine) the hosts/panel. Found out so much about those obscure hosts. To Tell the Truth, What's My Line (RIP Larry Blyden, died in an auto accident in Italy) etc.
RIP Bill Christopher, I didn't know ye, but obviously you were special.