Bert (1969–2000; occasionally - 2003–2006), Cookie Monster (1969–2000; occasionally - 2001–2004), Grover (1969–2000; occasionally - 2002–2012), Roosevelt Franklin (puppetry), Harvey Kneeslapper, Lefty the Salesman, Professor Hastings, Tessie Twiddlebug (1974–1982), Prince Charming, Rufus, Officer Krupky (Episode 0581), Moe Busby, Beautiful Day Monster, Bart, Betty Lou (1969–1970), Charlie (occasionally), Harvey Monster (occasionally), Tarnish Brother, Larry Rhymie (1980), Various