In which TV series is Klinger a main character?

In which TV series is Edith Bunker a main character? In which TV series is Hawkeye Pierce a main character? Who played Radar O'Reilly in 'M*A*S*H'? Who played Klinger in 'M*A*S*H'? Who played Fred Sanford in 'Sanford and Son'? Who played Arthur "Fonzie" Fonzarelli in 'Happy Days'? In which TV series is Arthur "Fonzie" Fonzarelli a main character? Who played Richie Cunningham in 'Happy Days'?