1. Supreme Mugwump
2. Half blood
3. A large part in the the fall of voldemort

Albus Dumbledore was never proud or vain; he could find something to value in anyone, however apparently insignificant or wretched, and I believe that his early losses endowed him with great humanity and sympathy. I shall miss his friendship more than I can say, but my loss is as nothing compared to the wizarding world's. That he was the most inspiring and the best loved of all Hogwarts headmasters cannot be in question. Dumbledore's obituary