Fate series has a few armor. So does Fairy Tail, Fire Emblem series, Tales of series. Oh, Dynasty Warriors and Samurai Warriors have a lot of female characters with armor and complicated clothing, especially with the recent games. Also check out Bubblegum Crisis for Megaman-like armor.
My Facebook Cosplay Page~
Cosplays For 2013/2014
Asuna Yuuki (SAO): 90% ~ Gou Matsuoka (Free!): 95%
Aqua (Kingdom Hearts): 65% ~ Yuri Nakamura (Angel Beats!): 20% ~ Sayaka Miki (PMMM): 5%
Cons I'm Attending
TigerCon, NekoCon, VA Comic Con