By Victoria Luxford Dev Patel may be best known for gentler performances like David Copperfield or The Best Exotic Marigold Hotel, but he has quietly been working on a dark side to his filmography. After impressing in thriller The Wedding Guest and surreal fantasy The Green Knight, Patel directs and stars in a gritty new action-thriller Monkey Man. He stars as the anonymous Kid, who wears a monkey mask to lose rigged fights as a means of getting into the criminal underworld. However, he’s soon on a bloody path to revenge as he kicks, punches, and stabs his way to the men responsible for killin…