As-in a general community consensus?
Not gonna happen . . . well . . you'll get a bunch of opinions . . . but they'll all be based on distinct personal experiences which isn't going to mean a whole lot if everyone is running different software, which we all are.
I agree that Facebook is one that ranks high for me, but I'm sure that others will have other apps that rank high for them.
Personally, this is why I root . . to tame apps . . I'm not a heavy FB user for example, I just troll occasionally so I freeze that sucker when not in use using a Titanium backup widget shortcut on my desktop and it therefore drains ZERO for me when I'm not using it.
With all of my app taming techniques in play I end up seeing Google's own sync and play services stuff being battery hogs. Whether its location reporting or other services.