Who symbolizes Christ in J. R. R. Tolkien's "The Lord of the Rings"?

I have long been a fan of [J. R. R. Tolkien](https://en.wikipedia.org/wiki/J._R._R._Tolkien) , and have enjoyed his works from an early age. I am aware that he was raised by a Roman Catholic priest, and remained a deeply religious man his whole life. I'm wanting to pin down some of the major christian symbols and undertones in his works that are a byproduct of his Catholic world view. I would particularly like to know who or what symbolizes Christ in [*The Lord of the Rings*](https://en.wikipedia.org/wiki/The_Lord_of_the_Rings) .