Yeah, i would agree with all of this. Ngannou is/was a once in a generation talent.
Every now and then HW produces a freak like Brock or Frank. Unfortunately, ngannou hasn't been the consistent, long term champion with a terrifying reign of brutal knockouts as champion that he could have been had he stayed put for a while. But then we'd have missed him knocking down and arguably beating Fury.
Edit - and yes, tom almost certainly won't be the same kind of phenom that mgannou could have been/was. But, he could be a stable, entertaining, consistent HW champ. Maybe not the pop culture phenomenon of a frank or a Brock, but he could be something the ufc has never had.- a HW champion with an actual legacy of title defenses. In the big picture, this could be a basic building block in the effort of creating a motor substantial and deep hw division.