Who is the Toughest QB of all time?

I always laugh when people say that quarterbacks aren't tough. Yeah, they're prima donnas for the most part I would imagine. But that doesn't mean that they can't take a hit or are pussies, shite, they're usually just standing there in the pocket waiting to take the hit.

Favre obviously comes to mind as the toughest ever. I also like the story my dad always told me about Tommy Hodson (may be true, may not) when it was one of his first starts as a Tiger (may have been his first start) and he bit off part of his tongue and still played. That was always impressive to me.

Who else ya got?