Somebody that doesnt get credit because of his speed is Ali,but if you watch his career,you could watch him decide he was bored with a fight,and end it on one punch.
Against both Foley and Williams he just went,"Im bored now" and the fight ended. He also hurt that part of his legacy by playing with his food,he could have ended Patterson at any moment,but Patterson had pissed him off so he stretched out the whupping.