Indeed the title of the article and the person mentioned in it have an argument for being the answer.

George Foreman in his day was one of the biggest punching heavyweights for sure.

Certainly one of the hardest hitting men to ever live. A genuine monster in his day:

That uppercut he hit Frazier with above was perhaps one of the most savage shots ever seen in a professional ring.

A wrecking machine of a man who went through sparring partners, heavy bags and indeed live opponents like a bear would go through a freshly caught fish.

He mauled his way through the heavyweight division in essence.

But for him, it wasn’t in fact himself who was the biggest puncher ever to live:

Humble from George — perhaps some fans would argue that the likes of him and Mike Tyson were up there too.

Modern big hitters of today include the likes of Anthony Joshua and Deontay Wilder.