A few years ago I head it said that Ted Danson was the only actor in the history of television to have two hit sitcoms (Cheers and Becker) playing substantially different characters.
Soon he’ll be back in Help Me Help You, and his character looks substantially different again.
Can he do thrice that which no one else has done twice?
David Jason in the UK had two hit (sitcom) shows with Open all Hours and Only Fools and Horses. Both long running and popular, and the characters totally different. Can’t think off-hand about anyone with a succesful trifecta.
Mary Tyler Moore might qualify, with the Dick Van Dyke Show and The Mary Tyler Moore Show. I guess you could argue that she was only a supporting character in the first one, but it was a pretty big part.
Bob Newhart had two back to back hit comedy shows playing different characters, even if they did tie them together in the last episode.
The only difference between Laura Petrie and Mary Richards is that Laura was married and Mary was not. Both were pretty, sweet, kind, overly helpful, spunky young women.
Bob Newhart plays Bob Newhart - always. Regardless of what his character’s profession is.
Oh, so by ‘different character’ we’re not talking about just different people? You mean different as in completely different personalities? Or different as in not being a spin-off character from a previous show?
Okay, how about Betty White switching from the conniving maneater Sue Ann Nivens on “The Mary Tyler Moore Show” to the naive homebody Rose Nyland on “The Golden Girls”?
Courtney Cox as Alex’s girlfriend in “Family Ties,” and as Monica Geller in “Friends”? Although I guess maybe she was more of a supporting character in the first show…
Ron Howard in “Mayberry RFD” and “Happy Days”? Or do you think he was playing essentially the same character in each, although older in the second?
John Ritter in “Three’s Company” and “Eight Simple Rules”?