KO artists who weren't huge at the weight

Yeah, though not a KO artist per se, Hags did carry respectable power.

Focusing in on his size, for all his muscularity, I did read someone’s comment about Hagler appearing fine boned when they met him in person.

Also, perhaps due to an illusory angle, but Duran did appear ever so slightly taller than Marv in their pre fight face off.

At any rate, making all possible due allowances for same, as he appeared next to Duran, is it possible that we might talking 5’8” to 5’8 1/2” for Hags?

Certainly Leonard had him in the height dept. but despite tales of the tape, Leonard’s own true height was about 5’9” to 5’9 1/2” - Ray himself admitting to deliberate inflation of his height during this fighting days.

 

Again, not necessarily a straight up KO artist but an apparently 5’6 1/2” Qawi might perhaps fit the description here otherwise.