lavorante was touted as a future star. he KOd a good folley. I think the Moore fight was his first stopage loss?
Lem Franklin is a similar case, he looked to be a potential challenger for Joe Louis's title until Bob Pastor KO'd him. He was then KO'd 6 times in his last 9 fights, and died of his injuries against Larry Lane.
If we're talking about good fighters who always came to win, I'll mention Murray Sutherland. He took some bad beatings.
Mexican heavy of the 60's Manuel Ramos took some bad beatings and was ko'ed often. Duane Bobick comes to mind also Cleveland Williams suffered some brutal ko's...twice by Liston, the Ali fight, and twice at the hands pf Mac Foster...and I may be leaving one out.
As far as men of great boxing ability go, both Tippy Larkin and Tiger Flowers were prone to some heavy stoppages. It's far from disgraceful in Larkin's case being knocked out by hitters like Williams, Armstrong, Jenkins, Jack, Bummy Davis etc when you fight as often as he did, but there seem to have been several occasions where his chin just couldn't hold up. Pity really, when you think that he had the ability to box most people senseless.
I have a couple of films of Bombardier Billy Wells and he was knocked out cold in each of them. He was out for the count 11 times in total.
You could make a solid highlight reel of him, unfortunately with Wells on the receiving end of it. To be fair he did have his share of knockouts as well, 34 of them. His fight with Gunner Moir is the wildest I've seen from the old days of boxing. Georges Carpentier and Billy Wells training for their fight: http://www.britishpathe.com/record.php?id=27886 Wells was flattened in one round.
Ron Stander took some of the most brutal poundings ever. Jeff 'Candy Slim' Merritt nearly killed him in November 1973, and they guy still continued fighting on for a few years.