The blue dragonflight is based on magic and the arcane, and was led by Malygos who was killed in Wrath. His "human form" is described as being half man half creature and magical looking, so I doubt that would work for you. There a few female blue dragons, but most of them fairly normal looking elves, humans, or gnomes.
The green dragonflight is in charge of dreams, and is led by Ysera. Now she has a new and interesting model in Cata. Several other green dragons take female night elf forms.
I would suggest going to wowwiki.com and reading about the blue and green dragonflights, it will give you the lore (if you're interested), but also lists known members. Hope that helps some