Mikage from Aquarion EVOL.
That show is awesome. It's got mechas, comedy and quite a bit of innuendo. Even though the main female is a bit of a wet cloth all the other characters more than make up for her. It shouldn't take too much to guess that Mikage's the bad guy. I can't think of any characters that are effeminate, have long white hair and who dress pretty 'fab'.
He reminds me so much of FFIX's Kuja. It's not just his clothing that's similar. Both are really powerful mages but prefer manipulating people. The main difference is Mikage actually seems to be immortal, or at least several millennia old.
I've only seen up to episode 22 so far, so no spoilers please. I also got told not to watch any more until I'd watch the original Aquarion and promptly given said series.