Charles Baron de Montesquieu made a real impression on many of our Founders. A Frenchman, he wrote Spirit of the Laws around 1752. Numerous Founders both Federalist and Anti-Federalist quote his work.
It would be an interesting work to fully describe how he influenced the founding our Country. He is indirectly a founder.
BTW, he professed Christianity and denounced Deism.
That one actually already exists, Montesquieu.
https://librivox.org/the-spirit-of-laws-volume-1-by-montesquieu/
I had thought of including the philosophers who preceded the Founders, but many are there already.
https://librivox.org/two-treatises-of-civil-government-by-john-locke/
https://librivox.org/the-wealth-of-nations-book-1-by-adam-smith/
(All 5 books are there under Adam Smith)
And these
https://librivox.org/the-federalist-papers-by-alexander-hamilton-john-jay-and-james-madison-2
https://librivox.org/the-anti-federalist-papers-by-patrick-henry/
I was not involved in the creation of any of these, at any stage.