I think the Terrans were the best villains. And I do consider them villains. An almighty race that simply devours other worlds to keep themselves alive? That's pure freaking evil. Plus, they're the background evil. The masters tweaking the strings. They're Blofeld before he was given a face. Just a menacing voice that promises bad stuff. They wrote their history to seem as though they were just innocent people who made a mistake and just want to live OH WHY WON'T YOU HELP US LIVE ZIDANE?! but to that I say BAH!

They are the best villains.