Who was the first UFC champion?

Answer 1

Well Royce Gracie won the first UFC tournament at UFC 1.

But the first actual champion was Ken Shamrock who won the Superfight championship at UFC 6 by defeating Dan " The Beast" Severn by submission via rear naked chocke.

Answer 2

Chris Jericho Won The First Undisputed Champion by beating two wwe legends in that night at vengeance 2001 his first match with the rock when he won the world champion

after that Jericho defeated Austin to become the wwf champion