Randall hit harder than Tzyu He dropped Chavez with one shot in their first fight and staggered him badly with one shot in the scond fight. Six years later, when he was an empty shell, Tzyu beat on him for many rounds before he finally fell.
I agree that Cervantes was every bit as good or better than Tszu as a fighter. I disagree that he had more raw strength and power. Aside from Tszu have a far better KO ratio, his impeccable timing really helped make they most of his crushing right hand.
Pryor was more of a accumulation of hard punches , than a true one punch KO puncher. Bailey ,Tzyu , and believe it or not Judah, would be my picks at this weight.
Fuji would be my pick. And while he's not near the top, Carlos Bolillo Gonzalez is worth mentioning. He was a big puncher.