Joe Loius was undoubtedly one of the all time greats no question. However his recod was well padded with no hopers probably even more than in calzaghe's case. The situation with Loius was so well known it had its own name The Bum of the Month Club.
This wasn't a case of Loius dodging anyone quite the contrary, he liked to fight regularly so even if a fighter was outside the top 20 or 30 they still might get a shot at Joe.
Cannon fodder but not Joe's fault.