Also, regarding this:

The peacocking of rockstars only looks crazy and complex because typical Western middle-class heterosexual white men have been aesthetically straight-jacketed and lobotomized by their culture, and they don't even know it. It's understandable that in their straight-jacketed state, these men would benefit from models of aesthetically straight-jacketed masculinity. But I would like to see if the straight-jacket can be taken off, assuming that corporations, gender-typical heterosexual women, and men's own comfort zones will allow it.

I think you're being much too idealistic about subcultures. Any subcultural or countercultural milieu will feature the same human universals that exist everywhere else, and will therefore impose its own status markers and standards of conformity no less strict and demanding than the mainstream society. (Of course, the mainstream can usually threaten more severe punishments for disobedience, but the loss of status among people whose opinion one cares about is a terrifying enough threat for anyone.)

What you see as escaping the straight-jacket is at best just a change of masters, not an escape into freedom. (With the exception of a small minority who find that their natural inclinations and abilities lend themselves to achieving high status in some particular milieu especially well, but even this works both ways.)

Mainstream heterosexual men often make fun of "hipster" and "emo" men, yet the joke is on them. While they snicker, the hipster and emo boys are getting with the cute hipster and emo girls, and have less competition in their niche.

Trouble is, the girls in various groups like those respond positively to the same essential traits in men as anywhere else. Whether you have a mainstream image or any particular subcultural image, it's basically orthogonal to how attractive you are to women. Now clearly, a given way of dress and behavior will be acceptable in one place and unacceptable in another, but chances are that if you adjust your dress and manners to a different milieu, the women there will find you about as attractive as those in the previous place found you with your previous image. That has at least been my experience, both personal and observational, and I've certainly changed my image and the circles I've hung out in a great deal through the years.