2009 stats:
Manning
572 att, 393 comp, 68.8%, 4500 yds, 33 TDs, 16 int, 99.9 qb rating
Romo
550 att, 357 comp, 63.1%, 4483 yds, 26 TDs, 9 int, 97.6 qb rating
Bress
514 att, 363 comp, 70.6%, 4388 yds, 34 TDs, 11 int, 109.6 qb rating
They all look pretty similar in caliber of seasons to me. Each of them tops the other two in one stat or the other. And keep in mind Romo is the first quarterback in history to start his career with a 90+ rating his first 4 seasons.
As far as "comeback mojo", Romo routinely leads the league in 4th quarter QB rating.
I really don't see how you could get much better than that, really. He cut down on his mistakes dramatically. He needs to throw more touchdowns, but that's pretty much it. You're asking for all time great numbers, and that doesn't need to happen. He's among the league leaders in passing.
Romo is a championship quarterback, and would have been if his protection hadn't failed in the Minnesota game.