Leader said:
Our country was founded by secularists, and most of them were leaning more towards atheism than Christianity. However, that wasn't an acceptable school of though at that time, which is probably why they stayed in the "closet."
No.
Ben Franklin-After the disillusioning experience of seeing the decay in his own moral standards, and those of two friends in London whom he had converted to Deism, Franklin turned back to a belief in the importance of organized religion, on the pragmatic grounds that without God and organized churches, man will not be good. Moreover, because of his proposal that prayers be said in the Constitutional Convention of 1787, many have contended that in his later life, Franklin became a pious Christian.
George Washington-There has been a huge controversy, to put it mildly, about Washington's religious beliefs. Before the Revolutionary War he was Anglican – Church of England – which meant after the war, he was Episcopalian. So, he was clearly Christian ... He was quite intensely religious, because even though he uses the word Providence, he constantly sees Providence as an active force in life, particularly in American life. I mean, every single victory in war he credits to Providence. The miracle of the Constitutional Convention he credits to Providence. The creation of the federal government and the prosperity of the early republic, he credits to Providence ... I was struck at how frequently in his letters he's referring to Providence, and it's Providence where there's a sense of design and purpose, which sounds to me very much like religion ... Unfortunately, this particular issue has become very, very politicized.
Thomas Jefferson-Jefferson praised the morality of Jesus and edited a compilation of his teachings, omitting the miracles and supernatural elements of the biblical account, titling it The Life and Morals of Jesus of Nazareth. Jefferson was firmly anticlerical saying that in "every country and every age, the priest has been hostile to liberty. He is always in alliance with the despot...they have perverted the purest religion ever preached to man into mystery and jargon, unintelligible to all mankind, and therefore the safer for their purposes.
John Adams-According to his biographer David McCullough, "as his family and friends knew, Adams was both a devout Christian, and an independent thinker".
Abraham Lincoln-As a young man, Lincoln was clearly a religious skeptic, or, in the words of a biographer, even an iconoclast. Later in life, Lincoln's frequent use of religious imagery and language might have reflected his own personal beliefs or might have been a device to appeal to his audiences, who were mostly evangelical Protestants. He never joined a church, although he frequently attended with his wife, but he was deeply familiar with the Bible, quoted it and praised it.
John Jay- Jay was a member of the Church of England, and later of the Protestant Episcopal Church in America after the American Revolution. Since 1785, Jay had been a warden of Trinity Church, New York. As Congress's Secretary for Foreign Affairs, he supported the proposal after the Revolution that the Archbishop of Canterbury approve the ordination of bishops for the Episcopal Church in the United States. He argued unsuccessfully in the provincial convention for a prohibition against Catholics holding office.
Alexander Hamilton- Religion
Presbyterian, Episcopalian (convert)
The only notable 'maybe' is James Madison.