I like your post. My point aout Jackson and LaMotta is that Jackson is a lot faster and hits way harder, so I really don't see how LaMotta could stand a chance. As for RJJ, it seems we both agree he'd run rings around LaMotta.
But if I’m not mistaken, Lamotta beat great punchers before no? Sugar Ray Robinson and Bob Satterfield come to mind
I'm not that high on Jake,,,but in a 15 round fight Jackson gets beaten up and stopped. This fight would be won on who's the better catcher not who's the better pitcher.