I would say he has an argument to being rated above Rahman, Briggs, L.Spinks, Braddock, Marvin Hart, Jess Willard. I don't see hes rated above anyone else though, and i wouldn't say he's middle of the pack either certainly not in a H2H regard.
Max Baer trounced Primo Carnera, but if you compare their results vs common opponents, Carnera actually did a bit better. He was pretty consistent, at least up to a point.