tyson was good at this, as he is 5 10 and usually fought taller opponents.
He had a good jab, and as he was stepping in he was bobbing and weaving. His signature punch for quite some time was to do the above and then come up with a left hook to the head.
Knocked a lot of guys out with this.
He practiced this move a lot in the gym and was very fast while staying in proper position/form for lots of power.
I have copied this move with some success. I time my opponents right cross. As it starts coming, I step in...bobbing to the left. I go right into the proper left hook position which is knees bent, weight over left knee, hands up protecting face....then explode up with my left hook...springing like a released coil spring from left to right and up.
Lots of power can be generated with this punch and you can really catch people by surprise.
And if you miss because he falls backwards slightly, you are now in good position for a nice double leg takedown