A quote about Rocky back in the 40's. "He is the best middleweight in the welterweight division". They didn't have a formal Junior Middle division back then..and that is where both Rocky G & Norris are best suited for.
Don't forget he beat a shot Curry, too Norris was good, but lacked the durability to ever be called a great fighter. The loss to a faded Simon Brown pretty much sums it up regarding Norris.
I don't think it's fair but I had a buddy I'm pretending who used to call Norris "The Evil Floyd Patterson." but I do see my imaginary friend's point.