A new trend on the fall festival circuit this year is the biopic of the unknown hero, something that seems unthinkable now in the digital age. There’s One Life, about the Schindler-like achievements of Nicholas Winton, who saved nearly 700 Jewish children from certain death in German-occupied Prague. There’s Rustin, about the gay, Black activist who organized the 1963 March on Washington for Jobs and Freedom — literally, right down to the toilet facilities — and had to wait 50 years for an official thank-you.