I know this might be racist, but I think he'd be a good fit for that one South African organization that had a champion in last year's season of TUF. Extreme Fighting Championship. He's from Africa and has an African name, and he was in the UFC, so they might be willing to give him a somewhat-lucrative contract compared to anything else he'd get.
He also might be, like, a good low-level Bellator guy that they stick on the prelims to give them some hype, then after two or three wins he gets to be a main-card guy and can fight, like, Chris Honeycutt or something.
Or he goes back to Ring of Combat. If he becomes their champion again he could get a call up to a big org pretty quickly.
He KO'd Daniel Sarafian, who had extremely close fights with CB Dollaway and Cezar Mutante that could've just as easily gone his way, so Bamgbose has some skills.