My last tabulation was 2 years ago (it will be 3 in April).
Our #1 poster (or commentator at least) is still @[email protected]! He went from 36,515 Comments to 45,600! That's almost 5,000 a year so about 14 a day on average. 
@[email protected] has held onto their #2 position despite the years. They went from 31,664 comments to 39,400. SorosFootSoldier's lead is rapidly diminishing and emizeko may overtake him by the next count!! 
@[email protected] has put in a lot of work the past two years and has risen from #4 overall with 24,311 comments to a piss-soaked #3 with 37,900! Badposting and its consequences?! 
Their rise may also be attributed to the loss of the previous #3 holder, UlyssesT who had 30,587 comments at last tabulation and likely had more before they deleted their account.
Honorary mention goes out to @[email protected] with -6 comments, I dunno how you even get that to happen!!
Posting actual posts were not counted towards this tabulation (because the Search is shit and doesn't include that in User searches) but I have a feeling our actual #1 poster in that regard is @[email protected] with almost 12k posts - truly the only user on this site that actually keeps the front page alive I salute you 
damn, when did I manage to post that much
I wonder who has the highest posts-to-comments ratio, a true posting warrior who cultivated Inner Post while everyone else was commenting in the megathreads
I can figure that out tomorrow, its a minor change to my code.