Whenever the conversation turns toward bad writers and artists and actors, I always flash on a story told about actor Victor Mature, who was--to be honest--a terrible actor, but he knew it. The story goes Mature was working on being included in a big investment deal but the other investors were leery about including him since actors (in general) have a bad reputation in business circles. To allay their concerns, Mature had a friend set up a reel with clips spliced together of some of Mature's big dramatic moments and then ran the projector showing those moments to the other investors in a meeting at Mature's home. After it was over, Mature said, "As you can see, gentlemen, I am no actor." They voted him in on the deal.
Mature later played off his reputation as a terrible actor in a film with Peter Sellers called After the Fox. He was great in it.