Stories that seem almost too good to be true that would make for a great film would certainly be the Babani Sissoko film. This is the story of the man from West Africa who used his black magic skills to get a middle eastern bank to give him over $200 million dollars. He ended up in hot water in Miami was arrested but was so generous and helpful to the community there that the judge was lenient on his sentence and let him go early. In the end he's back home in Africa now living a quiet life but the hope is that a film about his wild story is created one day.
For now we have this BBC Documentary but a full length hollywood thriller would be great as well: https://www.youtube.com/watch?v=mKALCS0Fe5w