Heavyweights who actually defeated every lighter opponent?

I thought of Frazier but he did actually lose to someone lighter than him.

Frazier actually outweighed Foreman in their 2nd fight by half a pound.

Frazier also outweighed Cummings by 6 pounds who he drew with.

 

I think Foreman and Frazier were the same weight in there 2nd fight?

 

Strictly talking about Heavyweight resume I don't think Orlin Norris ever lost to anyone lighter than him.

But I'm not sure how many opponents he actually beat at Heavyweight who were lighter than him.

 

Ditto Roy Jones...

 

Vyacheslav Glazkov meets this criteria, albeit he only beat 2 x fighters he outweighed (plus plenty he weighed within a pound or two of).

 

Didn’t think of Cummings… he was very, very fat in both bouts and I don’t think anyone would say those guys were smaller fighters outside of the scales…

 

Can we get something like a 5-10lbs weight advantage being required? Not much to fighters being outweighed by 1-3lbs those fighters are the same size basically, It also doesn’t factor in that some heavyweight fighters weigh in with boots, jeans and jackets on… it also doesn’t to me seem in the spirit of the question for Frazier to technically be “bigger” then Foreman because he come in extremely out of shape in fight 2 lol I think 5lbs+ is a good difference but it’s your thread.

 

Well that'd cover Billy Conn too, who technically beat about 3 guys below his weight at heavyweight.