The options on the '77 and '76 models may be nice if you want them.
My opinion:
Automatic? No thanks.
Power steering? I'm using bigger tires than recommended for the OEM power steering.
The Y steering linkage? Nice until you lift it much, see big tires above.
Power brakes? Prefer hydroboost, see big tires above.
AC? With the top off what's the point?
Disk brakes? Okay, but there are other ways to get those and then you don't knock wheel weights off.
Fuel doors? I have an early Bronco because I don't want 'modern looking'.
/my opinion.
Best is the one that fits what you want.
OP asks what was the most sought after year, and why, from the dealer that year is how I read that. You could do all those things you mentioned to any 66-77. None of them came with big tires, like above lol.