The guy has so much talent and potential...How good is Ben Roethlisberger?

I'm not saying he is better than Tom Brady or Peyton Manning. I'm wondering where he ranks among the rest of the NFL though...the guy is pretty under-the-radar, having a career year, already has a Super Bowl ring, had the best rookie winning streak since Marino, and is on a team that has its main 2 focuses on shutdown defense and a power running game. Other than Brady and Peyton, talentwise, is Big Ben #3? Who else is better?