I like Joe Rogan but calling him a world class comedian and martial artist is not right. He doesn't compete in BJJ and he always was a middling comedian.
He was a state champion in Tae Kwon Do when he was younger and is a black belt in BJJ. He's very experienced in multiple types of martial arts. He doesn't compete because he's 54 years old but he still trains every day.
Statistically, "of all time" should probably include some dead people...