Why was Marciano so successful?

Should have said Heavyweight Champions.

 

Well there's 8 in that list. Want more?
Fitzsimmons
Sullivan
Patterson

 

You'd call Lewis a knockout artist with his left hand?

 

Frank Bruno would!

 

Bruno was hurt initially with a left hand from Lewis but can we really attribute comparable two handed power to him from this? The other guys iced fighters with both hands. It's not really the same thing.

 

So does Ali make that list? After all he basically knocked out Bonavena with his left hand...

 

Check out the Tyson finish and the Briggs fight.

 

I don't really call Ali a puncher how about you?

 

Don't know about you but I wouldn't call Lewis a double fisted knockout artist either.

 

Let us suppose that you are right ,and I am wrong ,that still would leave us with 10 heavyweight champions who had two fisted ko power.Which makes your original premise wrong ,though I entirely get what you meant
by it. Will that do you?