I've always liked Vicki Vale, even before the movie, though to be sure that kind of is my iconic version of her, now. I would liken her more to Lana Lang, the sorta and sadly 2nd choice to Bruce. But I say this without knowing all the relevant canon, divided as it may be over Silver and other eras.
But in a sort of contradiction she is a sort of perfect woman who got away, or the first one (and let to get away).
Catwoman may be a more iconic choice for Batman, but she has the villain past. Even Superman doesn't have a woman like that in his storyline (or does he).