Angel

Drunken, whoring unemployed man, near-constant disappointment to his family
1753: Turned into a Vampire, buried and rose from his grave
Named Angelus by Darla because his sister thought he had returned as an Angel
Massacred his own family, earned notoriety as the worst vampire in history
1898: Cursed by the Kalderash people as vengeance for killing their daughter;
They returned his soul, forcing him to be tormented by the horrors he had committed
Lived in self-imposed isolation, for centuries, to avoid the temptation to feed
1996: Gained a new purpose when he saw the current Slayer, Buffy Summers
1998: Lost his soul when he experienced a moment of pure happiness with Buffy;
Sent to Hell by Buffy to save the world, got re-cursed moments before by Willow
Returned to Earth by the First, moved to Los Angeles
Dedicated himself to "helping the helpless" with the Angel Investigations
Possessed by Twilight, fought Buffy & was eventually defeated
Decided to stay in London to help the people in the newly created Magic Town