Okay, I'll admit I had to work on it to figure it out with that complexion. IF you're okay with dying your hair, you could go with Fate's Archer. https://typemoon.wikia.com/wiki/Arch...te/stay_night)
You could also probably pull off a Gene Starwind https://outlawstar.wikia.com/wiki/Gene_Starwind
or an adult Black Star https://souleater.wikia.com/wiki/Black%E2%98%86Star
The characters aren't QUITE an exact fit, however, you can always adjust the character's story to fit you better (IE, Gene Starwind is a bounty hunter, so you could say "I got tired of risking my life and now I sell used spaceships!")
The other option would be to make a Borg or Terminator costume. Either one wouldn't be that expensive for the most part, but the Borg would be somewhat easier. All you really need is to make a partial skull plate from EVA foam, stick in some old cables, wires or parts and then strap it around your head while securing the cables under your shirt. You could put some paint on yourself to resemble the nanite conversion process.
The Terminator would be a bit more difficult in that you'd have to make a pretty exact match to your face's shape, then glue it down and hide the transitions with some latex (there's a couple of "do it yourself" latex skin recipes on Google). Then you have to get a makeup that matches your skintone.
When I saw your pic I immediately thought you were one of the Admirals from Star Trek The Next Generation. You could also pull off most of Patrick Stewart's roles....