Also, one of my coworkers had him as a professor for one of his classes back in college, which still kinda blows my mind.
Its strange how much and little different groups and generations think of this stuff. Most millennial gamers I know learned about Gygax from his two lines on Futurama. No idea what TSR is or who Arneson might even be. They dont have much curiosity or care about the particulars. Could be an internet thing.
I don't agree with that. They were both new to fantasy RPGs, creating it as they went along, so while they did come up with an amazing game, they still both made errors along the way and some of those made it into the game. You can overrate them very easily if you ignore those mistakes.This one paragraph is really all you need to pass judgement.
If you believe the man co-created D&D (and you say you do), then it is not possible that he is overrated. He is the man who literally co-created the greatest RPG of all time and the RPG all others would be modeled after.
I think this goes too far. Arneson had most of the ideas, but Gygax was a rules guy, and rules are a huge part of what makes a game. That makes it a pretty even split in my book.I think that quote is key. But it points directly to the view that Arneson invented D&D and Gygax published it. Gary never would have invented D&D on his own. Dave never would have published D&D on his own. There’s a clear line between creator and publisher or popularizer. I’m glad both were involved because I got to grow up playing these games, but it’s fairly clear one man created the thing itself...while the other put it out into the world.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.