Usually an Anti Hero. More likely to be the lovable traitor or the rival of the antagonist. Ends up just a villain, sooner or later.
Sephiroth from the Final Fantasy games
Sesshoumaru from Inuyasha
Kabuto from Naruto
Lucius Malfoy and Draco Malfoy from the Harry Potter series
Prince Nuada from Hellboy II
Spike from Buffy the Vampire Slayer
The Drow from Dungeons and Dragons
Fangirl1: OMG! Have you seen the fifth Harry Potter? Lucius is such a WHPB! I <3 him!
Fangirl2: Totally! But not as much as Sephy!!! Sephy is the ULTIMATE WHPB!