McCall: power, iron chin, easy to underestimate (journeyman record) reach, heart Rahman: big power, reach, heart Sanders: big power, fast hands, easy to underestimate (chubby, golfer, bad KO loss) height, southpaw, heart Brewster: big power, chin, pressure, heart Ruiz: fast hands, chin, easy to underestimate (morbidly obese, very stubby, lack of KO power, unthreatening demeanor) huge mass, heart 2/5 had fast hands, 3/5 had big power, 3/5 had at least a good chin, 3/5 were easy to underestimate, 3/5 were at least chubby, 4/5 were either rangy, tall or very heavy, 5/5 had heart. Southpaws are very rare in the HW division, so 1/5 is disproportionate representation.
This is a bit narrow considering SHW is fairly recent- also they're all capable of knocking someone out with a well timed shot that's the fun of the big fellas.
They didn't beat SHWs. It's an analysis of the attributes of the HW fringe contenders who beat 6'5+, 235+ lbs champs.
They can't be compared to the post-Bowe skilled athletic SHW's. Pre-Bowe the dominant HW's were around 6'2 210 lbs and less in the distant past.
He was the underdog but only 5/2 and Usyk was no fringe contender. All of the others were worse than their SHW opponent but had a puncher's chance, Usyk is better.