Anakin Skywalker has the most tragic character arc I have ever seen in media.
-Growing up as a slave.
-Loosing his first mentor Qui Gonn.
-Watching his mother die in his arms.
-Having to fight in the Clone Wars and whitness countless deaths of his troppers.
-Watching his padawan Ahsoka leave.
-Getting fooled by the Sith Lord Sidious.
-Loosing his most important person in his life - Padme.
-Being seduced to the dark side because of this.
-Getting sliced in pieces by his best Friend Obi Wan
-Getting burned alive.
And surving all this just to live a life alone in constant pain in his armor.