Well, I tend to think that this is complicated. Wesley should always get a tip of the cap for his role in the beginning (Braunstein, Blackmoor, Greyhawk, get it?).
But he wasn't really down with RPGs. I know! And Braunstein wasn't really designed for the roleplaying- that was player driven. So, I think he gets just the right amount of credit- the mention.
The issue with EGG and Arneson is more complicated. I tend to oppose both the deification of EGG, and the backlash/hagiography of Arneson. I do think it is incorrect to view them as equals in an endeavor (Lennon/McCartney), and I also think it's unfair to tar Gygax as the Ray Kroc of this situation- someone who just took someone else's idea and marketed it.
If you know the history, and read this article, it's not surprising. Arneson brought in the magical element; he took Chainmail and turned it into the semblance of what we know today- an RPG. He was the original element of chaos- as he was in Braunstein.
BUT ... and this is a huge and unavoidable but, he wasn't Gygax. Here is the telling pullquote, which is in accord from everything I have read: "Arneson didn’t have a concrete ruleset; he was making things up as he went along. But, Kuntz said, he did manage to cobble together 18 pages of handwritten notes, a lot of which were simply stats for Chainmail monsters."
Arneson could never have created D&D; it wasn't in his DNA. Everything we think of as "D&D," the books, the rules, the mythos, that was all Gygax. Would he have done it if he hadn't played in Arneson's game? No. That really was a eureka moment.
And I think that's where we get to the root of that particular bad behavior; it isn't right, but you can see that Gygax brought Arneson on board, and Arneson just wasn't capable of producing any product. And, well, that can be frustrating.
Arneson deserves all the credit in the world for creating the "RP" part of RPGs, but Gygax made the game. The two things are not mutually exclusive.
Eh, I like the articles, and I think it's healthy to have multiple sources reporting on our hobby. The worst that can happen is that they're wrong, and it's better than insularity.