Wait are you talking about people who take everything too seriously or have a "dry" sense of humor, because those are two very different things. I don't see the posters you mentioned as having much of a sense of humor at all, dry or otherwise.
I guess they’re not exactly the same, but I would say there’s a very high correlation. People who have a dry sense of humor tend to take things too seriously. But for the purposes of this thread, who are the Atlasians who take everything way too seriously?
When I think "dry" sense of humor, I think of like a sarcastic, deadpan style that's popular in British comedy for example. I don't think lacking one entirely.
Anyway, you already mentioned Ferguson and Fuzzy who are some of the first to come to mind for taking everything too seriously IMO. Can't really think of other obvious examples off the top of my head.
OSR is just like Fuzzy in that both of them get extremely offended whenever someone makes a lighthearted joke about them, and they’ll usually follow up with a post thoroughly explaining why they do not believe what the joke says they believe. Also, I don’t think I’ve ever seen OSR or Fuzzy try to make a joke. Sure, some of their takes are hilarious, but those don’t count since they didn’t intend for them to be funny.
GMac is also like this, but at least I’ve seen him make jokes before.
Fuzzy is honestly a good sport, his problem is that sometimes he is too thick to even know it is a joke.