#1 Haku
He may not have had a historic career in the WWE, but most wrestlers of decades prior will always describe Haku as the toughest man to ever enter the squared circle.
There have been dozens of stories of the Tongan's prowess, including an incident at an airport bar, where the former Tag Team Champion was relaxing with some fellow wrestlers.
After being accosted by a group that insulted Haku, calling wrestling 'fake', the Superstar showed just how real he could be, biting the nose off of one of the gang.
This wouldn't be a one-off instance for the former Meng, who in another story bit the flesh of off someone's back, and also broke another person's front teeth out of their mouth.
Also known as a true professional in the ring, every WWF Superstar knew not to tick off Haku.