Wlad comes to mind, even if he was capable of much more, he could and would methodically break opponents down with a persistent jab and one two as well as anyone.
Carlos “Monotone” Monzon fits this bill to me at middle. At welter I’d agree with Cobra Curry. Among the big boys I’d add John Tate and Michael Moorer to the Klitschko ‘twins’ for consideration.