Starring roles

He's had hundreds of bit parts starting 1954, but few lead roles. I just scanned Imdb credits and found a TV movie I vaguely remember.

Planet Earth (1974,Roddenberry) https://www.imdb.com/title/tt0072000/

A man awakens from suspended animation and finds himself in the 22nd century, where he finds that women rule the world and that men are slaves called Dinks. He is captured and sold as a slave, but escapes and hooks up with a male rebel movement.

Enter the Dragon (1973) Roper

Strange New World (1975) - I don't remember it

Battle Beyond the Stars (1980) - plays evil tyrant

Not doing after 1980, most people know them.