I would recommend Hatsune Miku since she had ALOT of different costumes that have pretty much everything you looking for. If your looking for a challenge I would suggest you go with her Append costume since it has a little armor like pieces and plenty of LEDs.
However, if you want a broader idea on the sort of costumes she has i would suggest you look up her game Project Diva. I would link it but there's about 5 different versions so I don't want to cloud up my post in links.
Another idea would be any League of Legends character. They're all well known and they have tons of different skins so there's a chance it may not be too overrated. All of the females in the game have very detailed designs and some pretty sweet weapons to go along with it.
Just a word of warning though, make sure you look up whatever character you choose extensively. Fans will get very pissed off with you if you only make a costume because it looks cool rather than because you personally like the character.
Last edited by LunaticLenny : 12-19-2014 at 11:22 AM.