Forumite with the most posts who you didn't know existed?

[Хahar 🤔]

I can kind of recognize the name TJN2024 and I've definitely seen his posts but I can't really place him. The first name that I absolutely don't know is hopper, on the bottom of page 13. I've spent too much time here.

[Landslide Lyndon]

I'd heard of a lot of the ones before my time (ie. Gabu, Lunar) but the first one I was completely unfamiliar with was A18.

Same.

Me too, although I had the pleasure to interact with Lunar, one of our best and most intelligent members.

[I spent the winter writing songs about getting better]

NHI on page 9 with 3885 posts. Who apparently posts today but only in subforums I don't read.

[Clarko95 📚💰📈]

MinionOfMidas, the third poster in that chart. Neither his profile nor any of his posts look familiar to me. Which is bizarre.

[Chancellor Tanterterg]

Bono, the last name on page 3.

[🐒Gods of Prosperity🔱🐲💸]

Seeing some of these bring back only faint memories, but the first one I don't remember at all is YRABNNRM (YoungRepub), 10733 posts.

[ilikeverin]

MinionOfMidas, the third poster in that chart. Neither his profile nor any of his posts look familiar to me. Which is bizarre.

Lewis Trondheim?

[I spent the winter writing songs about getting better]

Seeing some of these bring back only faint memories, but the first one I don't remember at all is YRABNNRM (YoungRepub), 10733 posts.

He's actually posting on AAD as pkemp.

[Oak Hills]

ColinW, altho come to think I may recognize even him.

[Simfan34]

Seeing some of these bring back only faint memories, but the first one I don't remember at all is YRABNNRM (YoungRepub), 10733 posts.

He's actually posting on AAD as pkemp.

...

[Torie]

Seeing some of these bring back only faint memories, but the first one I don't remember at all is YRABNNRM (YoungRepub), 10733 posts.

He's actually posting on AAD as pkemp.

...

Other than having extraordinary perspicacity, I wonder why pkemp dislikes almost every post I make on the other site.

[MASHED POTATOES. VOTE!]

Bono

[LLR]

Weird considering I'm a newbie (relatively), but #109 Flyers2004, followed by #133 Emsworth.

[Antonio the Sixth]

MODU

I'm vaguely aware of A18, but have no idea what his posts are like.

[‼realJohnEwards‼]

minionofmidas.

[White Trash]

12th doctor

[Phony Moderate]

Going to go through them (have some time on my hands at the moment), with a brief comment on each, until I get to one that I can't provide any real comment on:

L'exquisite Douleur - Forum legend, thread starter, lover of obscure Family Guy characters.
Sibboleth - Long time moderator of the IE board until he quit around the time of the opebo banning (though probably not *because* of that) IIRC. Has some of the most memorable zingers.
minionofmidas - AKA Lewis Trondheim. Very good poster, tended to keep to the IE board so perhaps understandable why he's unfamiliar in some quarters.  
Keystone Phil - Very outspoken Republican from PA. Would be interesting to hear his take on current events, particularly the PA senate race.
Polygraph Polygraphovich Sharikov - Kalwejt. Used to post a lot more than he does nowadays. Was the subject of a nasty hoax a few weeks back.
Eraserhead - Movie buff leftie from NY.
Jante's Law Revivalist - Antonio V. Leftie Italian, resigned to Hillary.
Tender Branson - Likes posting polls, not a fan of Hillary.
Lief - Witty devoted Dem with a preference for establishment candidates. More prominent on the other place.
Xahar - Intelligent guy from California. Used to be a more prominent poster.
○∙◄☻¥tπ[╪AV┼cVê└/jfern - Controversial leftie from CA who has stopped posting.
Grumps - A more senior guy from PA. For the 12th most prolific poster on a political forum he talks remarkably little about, well, politics.
Queen Mum Inks.LWC - Started off as a non-controversial and very well-liked conservative poster. Then he became a moderator...
Torie - Lawyer from NY who used to have a blue avatar.
Eternal Senator North Carolina Yankee - Not actually that familiar but IIRC a Republican with a Japanese animation in his sig.
Joe Republic - Former moderator, witty NV guy who seems to have moved leftwards over the years for very understandable reasons.
True Federalist/Ernest - SC indie, moderator, makes good points.
J. J. - Subject of perhaps the most famous cartoon featuring a poster in forum history.
Hash - Not a fan of Stephen Harper.
Alcon - WA poster, still a moderator I think.
Kaine for Veep '16/bencostine - Fairly obscure but didn't the phrase 'moderate hero' start with him?
Lunar - Another moderator who quit.
Mr. Morden - Global moderator, quite funny, took an aburdly long time for him to be made a moderator of the presidential election year x board.
King - Kind of the NM version of Joe, doesn't seem to be around here much nowadays.
Gabu - Before my time but I've heard that he and BRTD didn't get along too well.
Gustaf - Swedish moderator of a board that I don't often post in.
Sam Spade - Turned up on the other place after years of absence, has some disagreeable views.
dead0man - Get the impression that he doesn't like 'the left' much.
R2D2 - Has returned recently, used to be a Ron Paulite IIRC.
Trump Bushie/BushOklahoma - The focus of the most (in)famous thread in forum history and possibly the only poster that has an entry on TV Tropes. Was actually a moderator once upon a time. Presumably he's supporting Trump based on the username, didn't know that.
Maxwell - Democrat who isn't a factional hack.
PiT, South Governor - CA right-winger. Used to be a more regular poster.
afleitch - Tory turned SNPer. Moderates a lot more boards than he used to due to various retirements.
A18 - And here we go. I know the name and have possibly seen some of his posts, but other than that no.

[morgieb]

MODU is the person with the most posts that I know nothing about.

David S is the person with the most post of whom I've never seen his posts.

EDIT: Although with Gabu, Lunar and A18 (Philip) for obvious reasons I only know what other people have said about them.

[Grumpier Than Uncle Joe]

Grumps - A more senior guy from PA. For the 12th most prolific poster on a political forum he talks remarkably little about, well, politics.

Quite observant.  I prefer the US General Discssion Board over any "politics" board.  Day to day issues are what I prefer to weigh in on.  Plus of course, I enjoy the social aspect of FC and OT.

I'm not into political polls, EV's, who can win what state, blah blah blah........

[Figueira]

Who is "B.R.T.D."?

[Enduro]

I'm not very caught up on major figures in the Atlas Forum, because I didn't know who the third guy is.

[‼realJohnEwards‼]

Who is "B.R.T.D."?

Bovine Respiratory Tract Disease?

[I spent the winter writing songs about getting better]

MODU

I'm vaguely aware of A18, but have no idea what his posts are like.

A18 actually had a wide range of posts, he started off as a teenage blue avatar style troll (although 2004 era where it was quite different), but then became a sort of libertarian who loved analyzing court cases and the legal system. It was a steady increase in quality and he was barely recognizable from his original incarnation at the end.

[Figueira]

Seriously though, Lunar.

[MASHED POTATOES. VOTE!]

Who is "B.R.T.D."?

It's BReTarD, n00b.