No! He would not.
The Supreme Court has held that an individual born in the United States is a "natural born citizen" regardless of the citizenship of his parents.
There are reams of laws and court cases supporting this. Please stop spouting this nonsense.
If his parents were legally within the United States at the time of his birth, yes. That is what the phrase meant at the time it was written, and this has been adjudicated multiple times. This is not debatable, yet people continue to spread this false garbage.
if it were at the time of our constitutions formation... yes.
but he would have to renounce his title and estate as KING.
If King Charles were born in Ohio, would he be a Natural Born Citizen of the United States?
No. His mother would have been visiting Royalty. As a legal fiction, when a visiting royal, such as Queen Elizabeth, travels, her country travels with her and she is still considered to be on English territory. In any case, she would enjoy full immunity from our laws and 14A would not apply, just as it does not apply to accredited diplomats who enjoy similar immunity.