You could always go scouring the Characters thread.
If I were you, I'd mix and match the character descriptions to get people you find exciting and useful to the story.
Or even take entire descriptions. There's bound to be a power or a backstory there you'll like.
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)