I realize that beauty is objective, not subjective. Either an object has consonance, symmetry, order, etc. or it doesn't.
HOWEVER --
When it comes to the attractiveness of women, beauty is in the eye of the beholder. I know it sounds like a contradiction, but different men ARE attracted to different kinds of women.
True, some women can be considered ugly by "most" -- but again, there are men that would be attracted to one of her features, perhaps the only beautiful one, and would overlook all the others. And looks aren't the whole picture -- some men want a helpmate, someone faithful, someone not hotly desired by hundreds of men, someone to discuss things with, someone with this or that virtue, someone good at cooking and keeping a clean house, someone good at raising children, someone totally devoted to him, etc. and physical beauty doesn't help with any of these things!
Some men like blondes, others prefer brunettes. Some like "skinny things"; others like women who are a bit more stocky. Same with tall/short.
Also, some guys want a woman who is highly intelligent, whereas other men would feel threatened by such a woman, because let's face it -- not every man has a high IQ.
In fact, each man comes from a different family, and is raised under slightly different circuмstances, so each will have a different psychological makeup. That is why each man is going to have a different "ideal woman".
So there is no single "most beautiful woman" that everyone can agree on.