I’ve seen him in one other place. He was one of John Wayne’s co-stars in “The Green Berets.”
I sometimes wonder if Duke knew about Takei, or about Rock Hudson, his co-star in “The Undefeated.”
He was in one other film that I can recall. A misbegotten, better forgotten space western, in which he played the drunken town doctor role. The film was called "Oblivion." and it was as weird as it was awful.

I wonder if this guy knew about Gomer Pyle?
No Hollywood actor could work without working with homosexuals or bisexuals. Richard Deacon, Nancy Culp, Paul Lynde, Agnes Moorehead, Rock Hudson, Dick Sargent, Nancy Walker, George Takaei, William Shatner, Tom Cruise, John Travolta, Robert Reed, Cary Grant, Greta Garbo, Katherine Hepburn, Betty Davis, Rosanne Bar, Rosie O'Donnel, Ellen Degeneres, Will Geer(Grandpa Walton), Brian Singer (director, XMen), Ian McKellen (Gandalf) and many others were either openly homosexual, closeted, or have had tons of insider rumors about them being homosexual.