These were from one of our founding fathers: He doesn't reference a state religion, nor should he, but I think it is quite clear what he is referring to.
“It is the duty of all nations to acknowledge the providence of Almighty God, to obey His will, to be grateful for His benefits, and humbly to implore His protection and favor.”- George Washington
“Of all the dispositions and habits which lead to political prosperity, religion and morality are indispensable.”- George Washington
"We beseech [God] to pardon our national and other transgressions"…- George Washington, Thanksgiving Proclamation 1789
"Every man, conducting himself as a good citizen, and being accountable to God alone for his religious opinions, ought to be protected in worshipping the Deity according to the dictates of his own conscience." George Washington, letter to the United Baptist Chamber of Virginia, May 1789
"We have abundant reason to rejoice that in this Land the light of truth and reason has triumphed over the power of bigotry and superstition ... In this enlightened Age and in this Land of equal liberty it is our boast, that a man's religious tenets will not forfeit the protection of the Laws, nor deprive him of the right of attaining and holding the highest Offices that are known in the United States."
-- George Washington, letter to the members of the New Church in Baltimore, January 27, 1793
"Government being, among other purposes, instituted to protect the consciences of men from oppression, it certainly is the duty of Rulers, not only to abstain from it themselves, but according to their stations, to prevent it in others."
-- George Washington, letter to the Religious Society called the Quakers, September 28,1789
"Dr. Rush told me (he had it from Asa Green) that when the clergy addressed General Washington, on his departure from the government, it was observed in their consultation that he had never, on any occasion, said a word to the public which showed a belief in the Christian religion, and they thought they should so pen their address as to force him at length to disclose publicly whether he was a Christian or not. However, he observed, the old fox was too cunning for them. He answered every article of their address particularly, except that, which he passed over without notice."
--
Thomas Jefferson, quoted from
Jefferson's Works, Vol. iv., p. 572.
Also, if you can find any record of George Washington taking Holy Communion, you should publish it. As no scholar has done so yet. And many have documented quotes from friends, family and clergy that say they never saw him do so.