There are 16 such true legends (active in the last 30 days):
~
That's quite an achievement if you think about it. 2-3 thousand posts and not a shred of valuable contribution to this forum. I'd be shocked if any of them aren't just bots.
Edit: there are ~40 other users with 770+ activity, i.e. potential legendaries.
There should be a special Rank for them: Shitposter! It can have the same Activity requirements as Legendary, but requires 0 Merit.