I remember stories that RA Salvatore played p99 for a while early days.

When I was playing on live, somebody had direct relations to Ron Perlman. Not quite the same thing, but...

Jeff Kaplan and Marc Merrill were both leaders of large guilds in Everquest. Jeff is the lead designer for Overwatch and Marc Merrill co-founded League of Legends. Not your typical celebrities but they're both definitely celebrities in the communities in which they occupy. They're also rich as fuck.

Jeff was lead designer of the best WoW expansion ever, Overwatch is a dog shit achievement compared to that.

Did he petition to allow the name Drizzt?

As long as you're distinguishing between played vs excelled then sure. But "celebrity" is a super relative term.

But to generalize down to high-earners I know that sit in the 1-10% income bracket (250k+) per year:
-I don't know many that game in general
-I know a few that might log on occasionally here and there
-I don't know any that would conceive of logging in at 4am to kill a boss or sit at a spawn for several hours/days

There are also dozens of engineer/science-types on P99 that have flexible schedules.

Matt Mercer from Critical Role and Jeremy from Pure Pwnage both played. Jeremy's story about BotB as a Wizard is heartbreaking. Mercer played an Enchanter.

Rygar is Hole legend Courtney Love by the way.

Sorry for outing you.