I am so excited for this fest! Thank you for putting it together.

Some more suggestions -
Barbara Gordon, DC comics
Rose Wilson, DC comics
Nick Fury, Marvel comics (and Iron Man films)
Bucky Barnes, Marvel comics - there's his prosthetic arm, but also a pretty clear case of psychological trauma
Matt Murdock (Daredevil), Marvel comics
Doctor Mid-Nite, DC comics
Vic Stone (Cyborg), DC comics
Roy Harper (Speedy, Arsenal, Red Arrow), DC comics

...I'll stop editing now, sorry for flooding your inbox