I appreciate your thoughts and observations. However, if you think about it, the Christ, the Saints and even the archangel Michael act under the authority of God. Ulmo acts in despite of the will of Manwe and the other Valar.
I suppose what I am trying to suggest is that, whether he realized/acknowledged it or not, Tolkien's world has an irreducible element of Teutonic/Nordic/Celtic and even Olympian pagan cosmology to it.
One may argue that all is under the will of Eru and so Tolkien's cosmology is ultimately monotheistic. But the same applies to Brahman of Hinduism. But who would call Hinduism a monotheistic religion? There are not only good and evil gods, but also ambivalent gods and gods who are not as simple as good or evil.
I think Tolkien loved the pagan cultures he studied and couldn't help but include their pagan cosmology in his world.
Agreed, Tolkien was definately inspired by Nordic (as he calls them) cultures and religions.
However, so is Roman Catholicism, which had become a mixture of Greek Christianity and Western-European/Roman religions, in order to appeal more to the pagans of Western Europe.
Think Christian holidays, which have replaced the Germanic ones, and still involve many pagan traditions. Eastern (Osterfest) for example, which involves the very pagan Easter-Bunny (fertility symbol), or Chrismas (Winter Solstice) with the pagan Christmas Tree and possibly Santaclaus. And obviously every holiday which date evolves around the moon/seasons.
So, even though the Bible speaks of Angels/Saints/Christ as beings obidient to God, its very possible Medieval people didn't intrepet it this way. Think about Christ on the Cross ("My God, My God, why have you forsaken Me?"), which may indicate they did have a free will and were responsible for there own actions. (Christ not being an ordinary Human, otherwise this would be obvious ofcours.)
It is also possible that Tolkien was a "Theosophist", believing that every religion has a center of truth and that they combine into the absolute Truth, though he would ofcours never admit this.
