I considered what Frazier and Norton did to be that "cross armed" defense (I believe Archie Moore used it and refered to it as the "crab defense", which he taught Foreman later in his career), not the "Philly Shell". They used the left arm to defend the body and the right arm crossed over to protect the head. I thought the philly shell had the left arm to protect the body, the right hand up to pick off left hooks and the rolled shoulder to protect the chin?

Either way, I agree with Tito in that I think James Toney used it more effectively than anyone I've ever seen, including the old timers like Jersey Joe.

Anyway whether I'm right or wrong about that stuff, my top 3 is...

1. James Toney
2. Niccolino Locche
3. Floyd Mayweather jr