She has 11 outfits in the film, multiple makeup looks, every single one is different hair as well. I don't really know how they could deliver anything that could handle all that in 1 package, and no way cloth will work with how complex the costumes are. You could maybe think snap-on outfits a la Polly Pocket but they'd barely be able to move, doesn't sound so ultimate. So yeah, every figure should be separate.
Finally, Padmé has many different appearances in TPM, which will make it difficult to choose which version(s) are most essential. If she was like a mini Barbie doll that came with multiple outfits, one figure could work. However, if we can do that with one character, we could do it with just about any character.
Sounds right on the money.
So, my suggestions would be:
Don't vote for R2-D2 in any subsequent polls.
Consider each Padmé outfit to be a different figure.
Vote for C-3PO only if you think the ANH version could not be made to work for a TPM or AOTC figure.
It could be that with the limited space in this poll, many of you would not find those versions essential enough to put on your lists anyway. So, I am inclined to just let people vote and see how things play out. What do you all think?