[Keeper of Dol Guldur]

Okay, not to totally undermine what the best thing to ever grace the planet was about, but I can't help myself. In recent months I have taken keen interest in Judeo-Christian Mythos (I am hard at work on my own fantasy series). I obviously notice the obvious connection between Morgoth-Melkor and Satan-Lucifer. But what intrigues me is this; what about his underlings? I understand Beelzebub was the captain of Satan's armies. Not unlike Gothmog? After all, a fiery devil is not too disimilar to a fiery demon. Vampires, Wolves and Spiders fit into the scheme as dark servents. But where in it all does Sauron fit in? Who is he? Besides the fact that he was a Maia of Aule and of the Fire element, a master craftsmen, what do we know to connect it? He has fiery cat eyes. He has black skin (in his WotR form). Who was he? Someone tell me. I need to know. And if you can think up more connections (pre-Christ of course, Tolkien himself didn't want to undermine the good book), do it.