I wonder how many of the original generation of leaders of the Reformation would run back to the Church if they were here now to see what a squirrel cage Protestantism has become. I imagine more often than not they'd be right here shoulder to shoulder with the Roman Catholics and Eastern Orthodox when dealing with the FreeRepublic 'Bahble Cults'.
I think Kolo put it in a proper perspective. A generation following Luther still tried to reunite with the Orthodox. Their major opposition to the Latins were the abuses such as selling indulgences. They were not interested in creating a cult. So, I would say probably many, except of course Calvin and his ilk.