Elon Musk reportedly plans to run Twitter himself temporarily when he completes his $44 billion purchase of the company later this year. But he will likely have to appoint a permanent CEO before too long, or at least bring in a deputy to help manage day to day operations—which raises the question of who that will be.

Chances are, he’ll look to his inner circle of executives or to past investors in his companies for someone with expertise in media, social media or artificial intelligence. That group includes people as varied as PayPal co-founder Ken Howery, former Zenefits CEO David Sacks and Neuralink executive Shivon Zilis. We decided to put together a shortlist of people we think could be on Musk’s mind.