Robert Q. Lewis was rather famous during the 1950s, with Name being his most well-known series. He frequently appeared as a panelist on CBS' What's My Line? and the 1970s Match Game.
Dennis James is well-known for hosting a myriad of games spanning from 1946-77. Most of his work has been destroyed, except for two shows — Name (five months) and another game (five years, becoming James' longest-running game and his last). Due to a few legalproblems, however, James is typically associated with Name instead.
Gene Rayburn, known best at this point of his career as a radio host, would go on to be the first sidekick on The Tonight Show and helm the 1962-84 versions of Match Game.
Mike Wallace hosted a few games before and after (including Nothing But The Truth), but is more famous for his work in journalism. Yes, him.
Keep Circulating the Tapes: Several episodes aired by GSN also circulate in their unedited forms (i.e., with original commercials), and can be found on some public-domain DVD compilations or among collectors. One of these episodes is April 25, 1955.