Lewis Rahman 2? That was almost a right hook Lewis put him away with. If you are referring to the first fight, yes, that was a great overhead right hand that Rahman landed.
Given the injuries that he sustained in that fight, he was right to quit. If I had been in his corner knowing that, I would have thrown in the towel!
Lewis landed a whopper on Weaver among many many others. Tyson too and i do remember a couple of rather big overhands against Holmes. Shavers has many.
I always felt Ken Norton threw the best overhand right for a heavy. It was fast as lightning and designed to take your head off. He used it with great effect in the 3rd Ali fight and his fights with Holmes and Young. He also levelled Bobick in the 1st round with it. Also, Tim Witherspoon threw a mean overhand, which accounted for many of his KOs.
DMT, check out this video highlight of Norton. Specifically the Bobick fight at the 1:07 mark. He throws 5 of them. The accuracy, speed and power is unbelievable. This content is protected