No, but those are the ones to bet on year after year.
We know the Flaccos and even Dilfers of the world can win the odd title but they need really good defenses. Which of course is the opposite of what we have.
That makes sense to me too.
So about Dak's ceiling. All of this is premature speculation, of course, but ....
Natural leadership and poise goes a long way. Dak has that.
I'm not saying he will be a top tier QB, but I think it is possible for someone with his physical abilities to become a top tier QB. He doesn't have the outrageous arm talent of some QBs (e.g., Aikman, Rodgers, Luck), but he has enough to throw the throws.
For Dak it'll probably come down to recognition, processing speed, and decision making. That's a big part of what he's working on now.
It would be a mistake to minimize just how fortunate Dak is to be playing with such a strong supporting cast. If he had a bad OL, he'd be toast, just like 99% of all young QBs. But Dak is in an unusually good position. He is basically set up to become the best version of himself. He seems to be positioned for a real chance to reach his full potential, whatever that might be. Most QBs don't get that kind of chance. With Prescott's mental make-up (his approach to the game), I wouldn't bet against him.
A random observation on a difference between Romo and Prescott -
Romo plays on the outside edge of his own talent and physical ability. He's had to press more over his career, for a number of reasons.
Dak plays within himself. Or at least that's how he's looked over the past 3 years or so.