Count von Count (1972–2012), Mr. Snuffleupagus (1971–1978), Herry Monster (1970–2003), Mr. Johnson (1971–2012), Two-Headed Monster (left half) (1978–2000), The Amazing Mumford (1970–2011), Biff, Sherlock Hemlock, Little Jerry, Frazzle, Fred the Wonder Horse, Farley, Simon Soundman, Sam the Robot (occasionally), Herbert Birdsfoot, Big Bad Wolf (1971–2012), Pooc Loco (1974–1976), Tina Twiddlebug, Rodeo Rosie, Mr. Chatterly, Noel Cowherd, Phil Harmonic, Sir John Feelgood, Tough Eddie, Cyranose de Bergerac, H. Ross Parrot, Japanese Storyteller, The Genie, Ernest the Grouch, Granny Grouch, Lefty's Boss, Marty, Joe Busby, Jack Be Nimble, Lord Hog, Vern, Cousin Monster, Jackman Wolf, Mary Rhymie (1978), Barry Rhymie (1980), Dr. Kvetch (1997), Cookie Monster's Pop, Cookie Monster's Sister, Charlie (occasionally), Harvey Monster (occasionally), Mommy Snuffleupagus (1970s), proto-Elmo (1980), Yip Yip Martian, Officer Krupky (Episode 0441), Various