OBJECTION! Sanguinare Vampir is a disease, vampirism isn't! You're hanging out with vampire haters too much.
Oh hell yeah no way in hell would Conner side with the Empire xD he's all about independence. I guess that takes Forsworn out of the equation since no way in hell would a Forsworn join the Nords. The Nords are the bastards they kicked them out of their homes in the first place.
Your argument is flawed on many levels. Sanguine Vampiris I think is what the disease is called that gradually turns them into vampires.
The creation kit lists vampires as a race. Thats simply the way the game is structured and has little bearing on what vampires are in TES lore. Your claim makes little sense when one considers that children and elderly are also listed as separate races in the game.
Back to vampires now. If left unchecked vampires will prey on mortals like cattle. You'd be glad to have a force fighting for your protection too, if there was something powerful and ancient above you on the food chain.
Based on what others have already said, I would have to agree and say that the most similar race to Native Americans are definitely the Bosmer (woodelves). Elves in general share many similarities to native Americans. If you look at it through a historical standpoint, both the Native Americans and the elves lived in harmony before other races landed on their shores (the colonists and the Atmorans). Also both groups were nearly wiped out by the "invaders" and driven back into hiding. I of course am referring to the falmer and the dwemer, who are pretty much extinct.