How about Smokin' Bert Cooper. Fought a who's who of Heavyweights in the 90's and early 2000's including tremendous wars with the likes of Evander Holyfield and Ray Mercer. Also fought the likes of Moorer, Bowe, Foreman and Saunders and pretty much always gave his all and would go out on his shield. Fought on far too long and ended up being a stepping stone for up and coming fighters but, in his day for a relatively undersized Heavyweight at 5,11", he was no mug and could definately swat a bit.
Awesome fights with Tillman and Moorer too. I cosign this, love me some Bert Cooper. In fact, he's probably in my top 5 HWs.