Two end of the extreme.There was a Heavy in the 90's and 80's named Mike white who was like 7'0 or so.Fought Michael Moorer and Lost dy Dec.From What I have down He KO'D Buster Douglas In 83' Not the best by any means ,just sprung to mind.
On the shorter side does anyone Remember Baby Jake Matlala?He was A hell of a fighter at Flyweight and I believe 4'8 or 4'9.TKO'd Michael Carbajal when He was The down side of career.Was a Tuff pressure fighter and was In with some quality guys.