I don't know about that.. Holyfield to me still stands as the best ever at CW while Usyk has stamped his spot as the number 2 CW All time.
IDK, we'll see how successful he is at HW. I know this is about CW but if you can move up and be just as good ala Evander that kinda gives more credence to your accomplishments at cruiser weight.
His only competitor for the number 1 spot All Time is Evander Holyfield who I think h2h would beat Usyk imo.