Hmmm looks like Rick Santorum needs to be added after he gained some momentum.
I think he is more on Romney's tier due to age but I still think he would lose to Obama. I think he would have better endurance than Romney but I think he couldn't hit as hard. I compared his off spring to Romney's and Romney's looked genetically stronger, which is my rationale for Romney's better strength. This leads to my poorly defended conclusion Obama comes out on top again.
Also, Obama apparently has a 200 bench press.
Another also... How sweet would an Obama vs Putin match be? Rock IV(government edition).