That isn't the argument, and you know it. None of the authors you mentioned have written epics. Epics by definition need to represent societal values, The Lord of the Rings does not. It is simply a novel liked by a generation by accident. Nothing more. There is no epic about it, besides its laborious length. True epics have not been around since Milton (I would argue since before that, but Milton is generally considered the last true Western epic), and the Lord of the Rings doesn't break the trend. Even Wordsworth's Prelude isn't considered to be a true epic, and it was far more significant than the Lord of the Rings. You do not know what epic is, if you believe the rings are an epic. length isn't the only thing in the equation. Scope isn't the only thing, and adventure isn't the only thing.
Tolkien brought nothing beyond a center ground to fantasy literature. Lord Dunsany had already written a removed world romance, the Germanic north had already written most of Tolkien before he even put his pen down. His style is borrowed. His characters are regarded by most serious readers as flat. He may have created something interesting, but he clearly is not a major author. He is merely a cultural phenomenon which has survived by being raised on a cultural pedestal by the inhabitants of many a parents' basement. The ring is almost the same as Star Trek, or Star Wars, except that it evolved from a book, and not a T.V. show. That is the only difference.

