you know it didn't come to mind at first because when you say "fight" or "action" scene you immediately go to the newer movies cause of the huge spectacle they've become, but i think perhaps the greatest overall scene might still belong to Batman 89.
pretty much from the joker's parade all the way up to the confrontation on top of the cathedral. first you got the epic debut of the batwing, you got joker standin firm like a boss wit a big ass gun... then of course you get to that massive cathedral and that epic climb up that spiral staircase as batman chases after joker... all to that haunting score. finally as batman makes it to the roof he's confronted by some henchmen and whoops their ass... all while joker lavishly dances away with vicki vale. then finally you get the epic final showdown.
"YOU IDIOT!!! YOU MADE ME!! REMEMBER!!!"
"I made you... you made me first".
Keaton's intensity is just off the fukkin charts in that scene.
plus the imagery is just fukkin incredible, with the church and the gargoyles... incredible stuff.