A historically "fact" based movie which was presented as a "heterosexual" movie was "The Grey Fox," with Richard Farnsworth playing the main true life character, Bill Miner, who was called a "Gentleman Bandit." Miner was a real person who robbed stagecoaches and after he got out of prison, he robbed trains instead.
His biographers, two newspaper men, would only claim that Miner was only "homosexual in prison," but their own research actually shows his sexual orientation as homosexual. I say that because no matter where he went, Miner always ended up with a male companion. One time, he was supposed to have married the daughter of a man who was trying to be a social climber by having her marry Miner, whom he thought owned a gold mine in California. Just before the wedding was to have taken place, Miner suddenly left town with another man.
The movie gave him female love interest in Kamloops, up in Canada; but, she never existed in the findings of the researchers.