Woah, déjà vu... :P
Anyway, a few names for your consideration:
Evil Minded Sod
Khan (good for when you have to yell
)
Mr Morden
Romana (or Romanadvoratrelundar if you really prefer)
Ming the Merciless (more of a cat name, really)
Uhura
Hasimir
Leeloo
Susan (as in Calvin, though there's always Invanova as well)