#4 Sabu
Sabu literally went on like he was constantly on a stream of different drugs throughout his entire career. He seemed to have no regard whatsoever for his own safety and if you need just one example of that, go and watch his Barbed Wire Massacre bout against Abyss. Honestly, it's one of the most uncomfortable things you'll likely watch and it's only the tip of the iceberg when it comes to Sabu.
He never gave up and always showed a great level of endurance and agility when wrestling, which leads us to believe that he could more than hold his own inside of the octagon. He may not exactly go on to be a world champion, but the guy could certainly play a part in having some tremendous Fight of the Night candidates because he'd just keep on coming.
Onto a man who found it rather difficult to hang up his boots.
