Who was the best heavyweight boxing champion of all time?

[99explorer]

Rocky Marciano was the only undefeated champ. Joe Louis also retired undefeated, but made a comeback and was beaten by Ezzard Charles.
It was said that Marciano's punches to his opponents' arms had a paralyzing effect.

[1994fordf250]

MUHAMMAD ALI is what i think

[cb bob]

I never saw Marciano, or Dempsey fight, but I remember my father and uncles talking about them. Both great fighters, no doubt about it. When I was growing up, Ali was probably the best.

[GERG]

Marciano or Ali get my vote.

[Sarge01]

Another vote for Rocky Marciano.

[Pmacc60]

Rocky Marciano undersized and undefeated,also Ali fought everyone in an era when everyone was someone and lost three years of his prime.I didn't like his politics but he was great.

[Treestand]

I vote for Jack Dempsey, This cat was bad to the bone!

[jay]

Of the fighters I have seen, Mike Tyson in his prime appeared to be unstoppable.

[Carl Huber]

Jack Dempsey beyond a doubt. He took the title from Jess Willard. Who killed the previous challenger in the ring. Willard had also taken the title from Jack Johnson. Another powerful opponent. Dempsey 6'1" 180 lbs. the victor fought Willard 6'7" 245 lbs from a crouch. Before the fight [one of the most brutal in boxing history] was over. Dempsey cracked his skull, shattered his jaw, broke ribs, broke his nose, knocked out 4 of his teeth and partially deafened him.
His restaurantt was on B'way around the corner from my Aunt's residents. He stopped to shake my hand and was a kind attentive man as I remember.

[99explorer]

Who was the best heavyweight boxing champion of all time?