There really isn’t a valid comparison to the Founding generation though, the Constitution was written specifically to cover that unique circumstance in history.
McCain’s place of birth will not be an issue in this campaign at all.
If you read Article II Section 1 you would answer your own question:
No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President;