I personally love Cowboy Bebop, and I think a steampunked Julia or Faye Valentine could really give you space to let your creative juices flow, although their color schemes might conflict with any garb you already have. Also consider comic book characters, I really enjoy seeing the Batman trifecta (Harley, Catwoman, Poison Ivy). Code Geass has a beautiful aesthetic as well, although not steampunk.
Upcoming Events: Katsucon 2014, Steampunk World Fair 2014, Otakon 2014, Dragon*con 2014
Harley Quinn (Arkham Asylum) - 100%, debuted at Otakon 2013
Asuna (SAO) -15%
Max Gibson (Batman Beyond)- 15%
Kirigiri Kyouko- 5%