i would like to suggest hagler as the scariest fighter ever for someone to step in the ring against hagler had a stare that bore right through anyone he had power and would never stop coming if you were hurt and was a brilliant finisher some people will say tyson but i still think hagler was just scary
Hagler was a ****ing nut before fights, the way he psyched himself up and blamed every conceivable woe in his life on his opponent. For having to train against them, being away from his family... Everything. He perfected that and brought a unbelievable intensity into the ring.