Voldemort - in spite of his pure evil nature, Voldemort is still one of my favorite characters.
Tom Marvolo Riddle. (He-Who-Must-Not-Be-Named / Lord Voldemort)
admit it everyone rearranged those letters to find out if it worked when tom riddle told harry he was voldemort
Ralph Fiennes as Lord Voldemort in Harry Potter and the Deathly Hallows: Part 2
I might be insane for saying this, but I actually find Voldemort in his serpentine form mildly attractive. Of course, it doesn't compare to my mental image of him when he was younger and infinitely more handsome.