Cindy justwannahave has never died and is the most immortal of all my characters. She is not a human but an alien from another dimension or something who happens to be a fairy tale.

Tiffany Aching runstowardsfire has walked through Death's Door and gone back out again because witches are basically cheaters if they can get Death to look the other way. Also a human from another planet with a relatively benign anthropomorphic personification of Death. [She has died quite horribly in a Wolf Game multiple times, but that is not known to her in Camp and she is not likely to ever find out.]

Guy of Gisborne redemption_fail is dead in canon and he is quite aware of it. Completely normal human.