OK, I wasn't sure about what you were saying. You are correct Most of the Founding Fathers were Anglicans (Episcopalians) which BTW Was much more conservative at that time than the Modern Episcopalian Church.
Thomas Paine is pushed as an Atheist/Deist, largly because of his work The Age of Reason that embraced French Rationalism, But were you aware that in later years he had a profound change and wrote:
"I would give worlds, if I had them, if the Age of Reason had never been written. O Lord, Help, Stay with me! It is hell to be left alone."
When Thomas Paine Gave his last words he said:
I die in perfect composure and resignation to the will of my Creator, God."
Paine still hardly sounds like a fundamentalist even at the end of his life. BTW, I can offhand only think of 2 Presidents in the 20th Century (Wilson & Carter) and 1 in the 19th Century (Hayes) who could be considered Fundamentalist. I think that the reason is that, until recently, most strongly religious people did not bother much with politics.