Tolkein's description of Sauron's God-complex is reminiscent of the aversion-against-God language found in Pullman, Dawkins etc.:
In The Lord of the Rings the conflict is not basically about "freedom," though that is naturally involved. It is about God, and His sole right to divine honour . . . Sauron desired to be a God-King . . . If he had been victorious he would have demanded divine honour from all rational creatures and absolute temporal power over the whole world.J. R. R. Tolkein, Letters, no. 183
But that kind of bare monotheism is as far removed from Trinitarian thinking as night is from day. The Christian God is not an oppressive tyrant in the mould of Sauron but a Being in Communion, a community of love. Self-giving lies at the heart of the divine identity, and therefore at the heart of the universe.