Gah... Ok, I can't believe I left Demeter off the first list. I swear I didn't intentionally forget you. *bows deeply in shame*
Eros definitely slipped my mind though. And yeah, I called Artemis off the bat, but went with Hecate instead. Here, revised list with Demeter in the first spot! And Eros added to the additional minor deities list.
Currently Taken
Demeter
Aphrodite
Poseidon
Ares
Nike
Eris
Hekate
Hades
Persephone
Pan
Apollo
Available from the Big Twelve
Zeus
Hera
Hestia
Artemis
Hephaestus
Hermes
Athena
Dionysus
Selected Additional Minor Deities:
Eros
Morpheus
Hypnos
Selene
Any of the Muses
Any of the Fates
Nemesis
Aeolus
Eos
Harmonia
Iris
Panacaea