Not exactly what you're looking for, but there is a WSOP player of the year that is calculated based only on the month long world series events at the Rio:
http://cardplayer.com/wsop_of_the_year/
The WPT tracks players based on the amount of money they've won, but only on the WPT itself(I can't find a link right now, I don't know if there is anything on their site, but I've seen it mentioned during the broadcasts numerous times)
I'm curious if there are other "rankings" out there, I am not aware of them if they are.