Those who have enough social conciousness and personal pride to maintain a healthy and well-groomed appearance, and dress well.
Certainly not xNTPs. We only care about the inner flow of ideas, and we only dress to avoid being naked. When I put extra effort into grooming and clothing selections it's generally because of how it benefits me, not because I particularly want to look good.
There are physically attractive people in all 16 types. There are ugly people in all 16 types. I think the correlation if any, with type, is very little. If there is a correlation with type, it probably stems from society's expectations for what is considered beautiful. Going by society's expectations, at least in the US, I'd say extraverts, particularly ESxx have an advantage as I think they would be the ones most inclined to follow the beauty and fashion trends. True natural beauty that one has isn't type related.
5w6 or 9w1 sp/so/sx, I think