PSUs most popular wrestler will come in the future. Some kid eventually will be a 4xer, with 2 or 3 Hodge trophies and a career bonus rate over 90%. It's inevitable.
You have to admit David has been unequaled so far in bonus % and that is what drives excitement, and in turn to a great extent popularity. It also doesn't hurt that he was our first bonus superstar in the Cael age, moreso than Ruth, who never seems to get the respect he earned.
If Bo had been Cael's first 'stud', he might well have gone down as the most popular so far - only one unfortunate roll through from being a 4xer
Even Bo, Nolf and Zain all as 3xers couldn't achieve the level of bonus dominance DT achieved. Neither Carter nor AB were close to even that trio in terms of bonus percentage, so national championships alone don't translate necessarily to overall popularity.