Tossing out more ideas...
Have you checked for vacuum issues? Could pressure test.
Shouldn't be an EGR leak giving a cylinder 1 misfire, shouldn't stop the car running either.
How about unplugging bank 1 sensor 2, seeing as you haven't tried my idea to swap it with bank 2. I don't know why, but some years seem to reference sensor 2 for the O2 calculation as well. I see nothing about it in the FSM, nothing in my tuning software, but users have reported it