Tom Bombadil vs. The Ring

[Mhoram]

While that works for your theory, I have no knowledge of Tolkien saying this or anything to the simular:

In the essay you quoted, Tolkien is using greatness to refer to the concentration of power within an individual being, not necessarily the total power at his disposal. So greatness, as used in that essay, is not quite synonymous with overall power.

If you'd like to share how you know for sure that this is what Tolkien intended...