Sorry, don't mean to denigrate Snurre! Though I admit that it seems like Acererak might outweigh him statistically (both the big bads of famous 1e adventures, both on the covers of 5e core rulebooks, but only Acererak got a brand-new 5e adventure centered around him). And I'm not sure Acererak beats out Iuz or Vecna...
No worries- tone doesn't come across. I'm usually kidding around, and I was there.
I think it's hard to compare GH personalities (for the most part) to those from FR and other settings, simply because GH doesn't have the same amount of lore. Whether you are a Gygaxian purist, or a lover of the 2e and 3e lore, there is still very little out there compared to, say, all of the FR books and settings and Greenwood writings and everything else.
Which means that the mythic figures of Greyhawk are much more blank slates, in a way, that people have built up not because of all the stuff about them, but in the absence thereof. When I say mythic, I am being literal in many ways.
It's similar with, say, ZARGON! I still think of Zargon, even though ... I mean, he is barely a part of a module in the B series.
But in the '80s, Vecna was famous not because there were stories, or the lore was fleshed out (um... ew...) but because the sparse details led people to elevate the idea in their own minds.
It's the Boba Fett theory of life. Sometimes, a thing can be much cooler the less you know about it.
