Thanks for some of the tips. I've read The Silmarillion and knew the Middle Earth "Gods" were closer to demi-gods than what D&D would consider Gods. However, they are relatively close to the Greek and Norse pantheons in some ways. Also, Middle Earth had no organized religion beyond some of what Sauron did in the Second Age.
I've decided to use Middle Earth as the setting mostly because I'm very familiar with it's history. However, this being D&D, I've had to adjust Middle Earth a little -- for example there is way more magic in D&D than Middle Earth. There will still be no Gnomes (although if a PC wanted to be one that's fine -- it would just be a sub-race of Dwarves) and Half-Orcs are mostly "queer eyed" humans. Half-Elves will be Dunedain (although I'm still working on that). There will be Clerical orders and temples as in a typical D&D realm. Also, Melkor has somehow come out of the Void and is attempting to influence Middle Earth once again (so that evil clerics can get spells).
Anyways, this is what I've come up with. Does anything seem out of whack?
God............Alignment...............Domains
Manwe.....Lawful Good............Air, Good, Knowledge, Law, Strength, Sun
Varda.......Neutral Good...........Good, Luck, Magic, Sun
Ulmo.......Chaotic Good...........Chaos, Good, Strength, Water
Aule........Lawful Good............Earth, Fire, Good, Law, Magic, Protection
Yavanna..Neutral Good............Animal, Earth, Good, Plant
Namo........Neutral.................Death, Knowledge, Magic, Protection
Nienna.....Neutral Good...........Good, Knowledge
Orome.....Chaotic Good...........Animal, Chaos, Good, Strength
Vana.......Neutral Good............Fire, Good, Plant
Tulkas.....Lawful Good.............Good, Law, Strength, War
Nessa.....Chaotic Good............Good, Luck, Magic
Irmo.........Neutral..................Knowledge, Magic, Travel
Este........Neutral Good...........Good, Healing, Luck
Vaire........Neutral..................Knowledge, Luck, Trickery
Melkor.......Neutral Evil.....Chaos, Death, Destruction, Earth, Evil, Fire, Magic, Trickery, War