When We Were Kings is the movie he’s looking for. That was the most interesting time in Foreman’s life until he made the old school comeback and knocked out Michael Moorer. I like George Forman but he was too much of an introvert when he was younger to make a movie about. He was the perfect Goliath in somebody else’s David and Goliath story. Spent decades depressed and out of the limelight until he became boxing version of Uncle Drew (if Uncle Drew was a real person.) It would make an interesting 30 for 30, but not enough for a movie plus you will have that being overshadowed by a much more interesting character part.
At least that’s what I think
Edit: now that I thought about it ,the story of the unstoppable monster taking an embarrassing L bouncing back and reinventing himself into he lovable entrepreneur might make a good movie.