There can be only one.

"In terms of tech billionaire CEOs literally fighting, Musk versus Zuckerberg would be as good as it gets. Musk, 51, has the upper hand on Zuckerberg in terms of sheer physical size, and he has talked about being in “real hard-core street fights” when he was growing up in South Africa. Meanwhile, Zuckerberg, 39, is an aspirational MMA fighter who is already winning Jiu-Jitsu tournaments. "

https://www.theverge.com/2023/6/21/23769263/mark-zuckerberg-elon-musk-fight-cage-match-worldstar