I’m surprised the Martin P6M wasn’t mentioned. It was a jet-powered strategic bomber—with a flying boat hull. Developed for the Navy, it was designed to carry nuclear weapons to targets and perform take-offs from and make landings on the water.
...Forget to add: it came close to entering service.
That was an interesting plane. Before satellites and intercontinental missiles our warplanes were constantly changing. Aprons had to have been so incredibly diverse, considering each plane had a different mission and so many platforms were phasing in and out very rapidly.