IMO frazier, chavez, tyson(when he felt like he should) tyson had fast feet, good reflexes and at his best came out of the weave with quick, very hard shots to either body or head with either hand. Very dangerous Frazier had like a steady bob and weave, was very durable, applied pressure and came up with the hook. Much simpler and more predictable than tyson but more steady and relentless. Chavez had faster feet than frazier but not as fast as tyson, pushed his opponents to the ropes, hit very hard to the body and wore his opponents down. IMO chavez was the best because tyson wasnt consistent enough and frazier was not as versatile. Patterson was great but a small guy Dempsey was very good as well.