i kinda think you are looking at boxing skills as a defensive thing. there are two parts to warfare, offence and defence. locche was far more "defensively" skilled than cervantes, but not as skilled offensively. foreman was a lot more skilled offensively than tyson (better at setting up punches). tyson over relied on his speed to land his shots, and only had fairly basic setups, which allowed him to be read fairly easily and out boxed by some fighters like holyfield (if you don't believe me watch an extremely overmatched don halpin frustrate and out box tyson (tyson still ended up blasting him)).
the reason halpin gave tyson so much trouble is he figured tyson queued off the jab to slip the right and land his left hook. so he stopped jabbing and started leading with the right, tyson walked into nearly every one.