First, I missed the second link in that post of yours. Sue me. I only saw the one and I wasn't going to slog through a thread for you. Second, I just went back and looked at the second link and it shows nothing like what you are claiming here. There were two quotes from Gygax, neither of which say that Tolkien wasn't a foundational influence.
The first quote just says that there are other authors he considered as well, which we all know from the list we are voting on. the second quote says that the heroes were kinda boring, but other than the ranger class lifted almost directly from Aragorn, I'm not saying that the heroes are the part of the foundation he took from Tolkien. Then the author of that article goes on to say that Gygax would often tell us which parts of Tolkien he took and which he didn't.
Your link doesn't prove your claim, and your continued "common knowledge" statement is nothing more than an Appeal to Popularity. Lots of things that are "common knowledge" are incorrect. Feel free to leave the conversation or stay, but do you really want to leave the discussion on a fallacy?