That leaves Ron Howard and Betty Lynn left from the main cast.
Other surviving cast members (although none had a long tenure with the show): Elinor Donahue (Ellie Walker, Andy's love interest during the first season), Jack Burns (Deputy Warren Ferguson, Barney Fife's replacement, in the 1965 season), Maggie Mancuso, sometimes billed as Maggie Peterson (Charlene Darling, who chased after Andy in a number of episodes), and Ken Berry (Farmer Sam Jones during the last season, before transitioning to the spinoff, "Mayberry RFD."),