It's more accurate to say that Bale is simply the most extensively explored Batman. And I would say that Bale being the most extensively explored and written Batman does not necessarily equal him having the best characterisation. I mean, even Kilmer is explored more than Keaton's version, but that still doesn't amount to Kilmer's Batman being a better movie character. And I'd say that's the case for a lot of people. That aspect that you're continuing to highlight, is, as SuperRouth said, purely subjective imo. For me personally, despite his Batman being mostly confined to the shadows, Keaton's Batman still manages to shine brighter than Bale's.