Our Founders' religious views were/are pretty well known, and often commented on.
As I have repeated here several times now: the best Founder example of a traditional Christian would be Washington's close friend, John Jay.
Virtually all the other major Founders were "into" some form of Freemason influenced, deistically inclined or Unitarian Christianity.
That includes even George Washington, but especially Benjamin Franklin, John Adams, Thomas Jefferson and James Madison.
For a listing of Freemasons amongst our Founders, start here.
For a listing of Unitarian-Christian Founders, you can start here.
For a listing of Deistic Founders, you can start here.
For a separate discussion on George Washington's Christian deism & Freemasonry, here is a place to start.
What ultimately matters, and mattered, is the person of the Christ. You can have any theology wrong and still have the Christ if you’ve called on the name of the Lord for salvation. We don’t secure the Christ by waving a net of doctrines in the air. The Christ offers Himself to us and all we are charged to do is to accept.
Now once you DO have the Christ, then what use you make of that relationship on earth, matters to the kind of fruit you will show on earth.
Washington’s reputed Freemasonry does not affect us now. It’s not him bearing fruit any more on earth. What WE are doing with Christ affects us now. Let’s not point a finger at Washington without realizing that three more point back at us.
I did post previously the church affiliations for the founders: