It was customary for the writers of that era to use pen names. Hamilton had a variety of them: Continentalist, Julius Caesar, How modest.
He, Madison and Jay all use Publicus for the FP. He was not trying to hide his identity and anyone who was interested knew who was writing them.
Really, how many cases can you document?
There is also the little issue of Hamilton fraudulently claiming credit for 63 numbers of the Federalist, some of them plainly written by Madison.
Patrick Henry was not a nationalist and did not want a government strong enough to create a more perfect union. After a great start he too wound up on History's Loser List.
I very much doubt Patrick is concerned with your opinion. What exactly does a "more perfect union" mean? For me a free society will suffice, others equate the ability to control and dominate others with "greatness".
Since H. was replying to Cato (George Clinton) - Julius Caesar was an appropriate choice of names. In view of his end, it was not a little ironic.
Hamilton indeed wrote 2/3 of the papers most authorities agree. He wrote about 15 of those in conjunction with Madison. Jay wrote 5. Madison could not write with anything like the speed of H., the greatest newspaper columnist of his day. His words were read by more people over a long period of time than any of his contemporaries. Had Madison been required to take a greater role the series would never have reached 85 essays.
Hamilton understood, unlike his enemies, that freedom needed a bulwark to survive and that history had repeatedly shown that it failed to survive when that fortress was missing. That was the goal behind his policies.
Had our first president been one of the democrat-republicans rather than Washington I have no doubt the nation would not have survived. Or if it had it would have been destroyed by a Confederate victory and the loser would have been mankind as a whole.