MoeMall, MatchWigs and Ayanamisatoru (on eBay) are good wig stores. I've personally ordered from all of them and been pleased.
Masamune Date - Sengoku Basara
Eren Yeager (casual outfit) - Attack on Titan
Levi (suit) - Attack on Titan
*~Next con I'm attending~*
FIN Desucon Frostbite (13-15 February 2015)