Gene Autry - the singing cowboy star made 90 films from 1935-1953. He also created his own television series that consisted of 91 episodes from 1950-1955.
William Boyd created the film persona of Hopalong Cassidy and starred in 66 films from 1935-1948.He was the first cowboy hero to have his own television show that ran from 1951-1954.
Roy Rogers - the other singing cowboy star was the hero in 90 films from 1938-1975. Like Gene and Hoppy he had his own television show from 1953-1957.