/wsr/ing anime that have lots of outfits, but preferably with few main characters.
Sailor Moon comes to mind. Other than the uniform, they change outfits frequently.
I prefer shoujo or josei, but whatever works.
Paradise kiss.
Princess Jellyfish
Both are about fashion specifically though.
kobato
gosick
Dirty Pair, Creamy Mami, Cutie Honey, Michiko to Hatchin, maybe Black Butler. You should probably look into 80-90's anime in general, they seem to fit what you're looking for.
Lovely Complex.
>>173476
Shirobako
Cardcaptor Sakura
Tsuritama, Gatchaman Crowds, Gankutsuou.