Dwight Muhammad Qawi was a 5'6" light heavyweight champion.

Qawi would beat Bivol IMO not sure about Beterbiev as he hits very hard and is a big Light Heavyweight.

 

Qwai was a terrific fighter, strong, tough, excellent defense, explosive , intelligent but Langford was all of that with explosive heavyweight level two handed KO power and 3" or so more reach and a ton more fight experience under his belt against the best fighters in multiple weight divisions ... hard to imagine ..

 

Qawi-Beterbiev would be titanic!

My natural tendency would be to go with Qawi because of better opposition, strength and defense but Artur has impressed me though the challengers are woeful (not his fault) compared to Qawi´s division.

I think Beterbiev would give Qawi some problems early on before being stopped late in a FOTY candidate.

 

I'd still take the Buzzsaw,

simply because that Era, though Prizefighting TOUGH, it was not yet as athletically refined as the Fighters were becoming by the mid 20s and beyond.

 

Demonstrates how important sparring is, and what can be
be accomplished if it's consistent and smart.
Qawi learned what works for him in a prison boxing gym.
Jeff Chandler learned what worked for him in the gyms
of Philadelphia (Had one or two amateur fights.)
Both looked like fighters that had a ton of amateur
experience.
Sparring is probably the most important aspect
of combat sports along with natural ability.