Famous, or infamous, people make for good subjects of movies, whether documentaries, essay films or fiction features. Just look at the lineup of this year’s Locarno Film Festival, whose 79th edition, running Aug. 5-15, features all sorts of screen stories about bold or recognizable names. From a German entertainment figure and an Italian film and series creator to a U.S. prisoner sentenced for an “unintended crime,” the program of the Swiss festival allows you to learn more about people who have been in the headlines. Plus, there is also a cinematic letter to a documentarian of modern Lebanese history and a fiction...