Thomas Tryon

Thomas "Tom" Tryon (January 14, 1926 – September 4, 1991) was an American film and television actor as well as a novelist. He is best known for playing the title role in the film The Cardinal (1963), featured roles in the war films The Longest Day (1962) and In Harm's Way (1965) with John Wayne, and especially the Walt Disney television character Texas John Slaughter (1958–1961). He later turned to the writing of prose fiction and screenplays, and wrote several science fiction, horror and mystery novels.

Source:Thomas Tryon on Wikipedia.