Kid Gavilan, Bernard Hopkins, Oscar De La Hoya, Erik Morales, Carlos Monzon, Antonio Margarito. Antonio Tarver, although it should be noted that he has a tendency to 'shut it down' and get too defensive when he's tasting leather. So far, Paul Williams seems pretty durable.
I would not call Sanders lanky ... Jess Willard ... never stopped till 37 ... Larry Holmes ... Morales was an excellent choice till he finally cracked ... Vitali had a pretty amazing chin ...
Joe Calzaghe is a durable,tough guy and he's certainly rangy. Jeff Harding for a tall guy with no defense he didn't get stopped much. Michael Spinks minus the Tyson fight fits the bill.
Max Baer is another that qualifies. Very durable, but spend a lot of his career at 6'3" 200 or less pounds; pretty thin.
I recall in the Tyson fight, the ref asking Ribalta if he wanted to continue and he said something like "Hell yeah". Tough guy. You beat me to it McVey. Eusebio Pedroza was a tough mf'er.
jose luis castillo, at 5'8, that guy took the best shot from every good light weight of the last 5 years and could take them in deep waters after taking and giving equal punishment with guys like lazcano, diaz, mayweather, casamayor, johnston and coralles. a great case could be made with bernard hopkins.