Santana deserves an oscar for the first two fights, but norris shouldn't have done those stupid acts.
Zivic would probably be the all time champ in fighting dirty for those who were familiar with him. He once was offended at the suggestion Harry Greb was a contender for that distinction.
In the fights of Harry Greb vs Chuck Wiggins, they kicked, bite, low punched and did everything illegal, and when Wiggins beat Greb one time, he said that he was having too much elbows for Greb that night.
Wladimir Klitschko with his disgusting clinching against smaller oppenents. He does not clinch like others he clinch for competitive distortion.