I hope we’re not in too big a hurry to get this started. 
The longer I think about it, the more (problems?) I come up with.
I think it might be better to define the sub-categories along lines other than genre. There isn’t an easy (or fair) comparison between someone like John Bonham and Ringo Starr if they are both classified as simply “Rock”, but if we start trying to sub-divide “Rock” we’ll end up with 544654345 different distinctions. One possibility would be to divide along “Style” lines. There would have to be some degree of overlap, but that’s okay.
Some possibilities (and feel free to discard, revamp, rename, criticize or whatever) could be:
Technicians - drummers who play very tight and controlled, but with complexity. Most jazz, fusion and progressive players would fit here. Think Neil Peart, Omar Hakim, Buddy Rich, Mike Portnoy, and etc.
Time-keepers - like the name implies, drummers who play simple (but elegant) lines. This is not an easy thing to do well, but most of the people who do it right tend to get overlooked. Charlie Watts, Kenny Aranoff and Simon Kirke are perfect examples of what I mean. Rock solid timekeepers without being simple metronomes.
Wild men - these are the “monsters” of drumming. They play hard and they play loud!!! Bonham, Moon, Tommy Aldridge, Tommy Lee, Carmine Appice and even Billy Cobham all fit this category.
Stylists - people with a distinct style (Vague I know). I’m going for people like Bernard Purdie, Styx Hooper, Jim Keltner or Buddy Miles. That big fat backbeat thing, if you know what I mean (this category needs a better name).
Percussionists - this is kinda the catch-all for the drummers who don’t play actual drum kits. Tito Puente and Airto, Ray Cooper and Ruth Underwood. This would give at least one category for the so-called “world” percussionists. (Would Roy “Future Man” Wooten go here?) We’d have to decide whether to include the drum line and koto drummers in this category or have another separate category (or several).
I’m sure I’ve overlooked …well, a lot, probably. But it doesn’t seem practical to compare based on genre alone. I think a poll based on that would say more about what kind of music people like than which drummer.
So those are just some thoughts about organizing this mess. 
Not a lot of help about choosing who to include, I know, but whadda ya gonna do?
