Poll: Best Oscar Nominated Actor-Producer Combo?

As of 2020, only seven people and twelve movies have "officially" secured a rare dual acting and producing Oscar nominations for the same film. Prior to 1950, Best Picture nominees were in the production company's name and not in the name of any credited producers. Unofficially, Orson Welles's Citizen Kane and Charles Chaplin's The Great Dictator would add two more, bringing the total to nine people and fourteen movies. Which same person Oscar nominated actor-producer has the best same film combined results, both in terms of their character portrayal and resulting movie? Discuss the topic here.