Other than DBZ characters, Bill Cosby is the ultimate.
Your guy called Champion lost to the Silver Surfer. And the Silver Surfer lost to a bomb or something. I know he was shocked by electricity. Goku could beat him IAS. (In a second.) If he lost to somebody who was severly injured by a missle or some kind of Human weapon, than he can`t be too strong. Of course regular Humans can`t compete like Bruce Lee, some humans have advanced capabilities like Krilling, Yamcha, Tien, and Master Roshi. These characters are no longer considered powerful in DBZ, because their power level is around 20000. Except Master Roshi who has about 100