[quote=Prince Potter]
I looked around a bit at the Green Lanterns, but all the Human Green Lanterns mentioned were important major characters, such as Hal Jordan or Kyle Rayner.Can I take a Villain, turn them Good and give them a blue ring..?
[/quote]

Well, Rayner was a Blue Lantern at one point, so it's not out of the question he'd be one again. On top of that you have other cosmic Marvel characters to choose from.

I'm open to basically whatever as long as you write a great CS.