Clu Gulager's final film was 2019's Once Upon a Time in Hollywood.
If he could have made one more film that came-out the next year that would have made 8 decades of films!
Instead, is was a mere seven decades of movies and TV appearances. Wow!
1964's The Killers was a terrific Gulager vehicle, with Lee Marvin and Clu as the Killers. The other leading roles were played by John Cassavetes, Angie Dickinson and ... in his final movie role ... Ronald Reagan.