Dumbledore might be death.
J.K. Rowling has Harry Potter enthusiasts shooting celebratory sparks from their wands since she commented on a theory that Dumbledore might be death from "The Tale of the Three Brothers." The theory contends that Voldemort, Snape and Harry are the three brothers, with Dumbledore representing death. She didn't confirm it, instead calling it a "beautiful theory" that "fits" within the story.
So now we will leave it to devout fans to scour the books and debate their findings in forums. Dumbledore did once tell Voldemort that "Indeed, your failure to understand that there are things much worse than death has always been your greatest weakness." One thing we know to be certain about Dumbledore is that J.K. Rowling confirmed in 2007 that he was gay, so if he's also death, this guy had a very complex and nuanced life.