JD’s Revenge (1976)

It’s well established I have an unnatural affection for Blaxploitation films, but here we have Glynn Turman as a New Orleans law student who becomes possessed by a murdered 1940s gangster bent on revenge and it’s glorious. Turman completely goes for full Jekyll-Hyde vibes as his mild-manner character is gradually taken over by JD’s personality. There are fun, unexpected twists during the climax that makes me somewhat recall Angel Heart and not just because of the shared location.