Literary Characters Who Sacrifice Themselves

What do you call someone who sacrifices themselves?

Not selfish; selfless; generous; altruistic. 1. 0. self-giving. Characterized by self-sacrificing behavior; unselfish.

Who is the most famous literary character?

“Sherlock Holmes,” it is claimed on the promotional material, “is not only the most famous character in crime fiction, but arguably the most famous character in all fiction.”