I love Grant, he and Breyfogle did great stuff together. I honestly enjoy his Batman more than Morrisons, but I acknowledge Morrison's influence on the character. For Miller, DKR and Year One are probably the most influential Batman stories of all time. DK2 was hot garbage. DKIII and it's one-shots were pretty good, but far from seminal works. ASBR was only saved by Lee's art, outside of that it's not very good.
Pulls: Batman, Detective Comics, SiKtC, Catwoman, Nightwing, Titans, Godzilla, Wonder Woman, Batman & Robin, Brave and the Bold, No/One, Kill your Darlings, and Deviant.
My runs: Batman #230-, and Detective #420-
Chuck Dixon is amongst the first that come to mind because he's written SO much Bat.
Denny O'Neil for sure, his contributions as writer and editor can't be overstated.
And then Grant Morrison, his Batman run was so good, so extensive and so celebrated, he's rightfully earned his place as a top Batman creator of all time.
Denny O'Neil-The guy who brought seriousness back to Batman
Chuck Dixon-No one writes a better Riddler than him and he did spectacular work with the other villains as well
Paul Dini-Probably the most well-rounded writer of the group
Honorable Mentions: Frank Miller, Grant Morrison, Alan Grant, Doug Moench, Greg Rucka.
My Top (3) Three:
1. Timm/Dini (tie)
2. Dennis O'Neil
3. Chuck Dixon
Denny O'Neil
Doug Moench
Bill Finger
Honourable mention to Steve Englehart, Mike Barr and Bob Haney (I know his stories were bizarre and whacky but his Brave and the Bold with Jim Aparo was my introduction to so many DC characters including Batman)