I do not know of any Tolkien list - but it would be a very good idea. Some articles about Tolkien have mentions of Narnia and so come up on this list.
With these bio films about Lewis and Tolkien, I wonder how they will handle the sombre topic of the end of their friendship - there was a rift between them, which meant that at the time of Lewis’ death they had not spoken for years. The exact reasons for this are difficult for biographers to untangle.
The rift is exaggerated . They drifted apart; most think Lewis developed other friendships which Tolkien didn’t share. Shortly before he died, Lewis nominated Tolkien for a Nobel prize in literature for LOTR.