Rumplestiltskin

Branded a coward for purposely injuring himself to get out of being drafted
Became the Dark One to stop Baelfire from joining the Ogre war
Chose his magic over his son, Baelfire was sent to the land without magic
Helped Regina become the Evil Queen so she could cast the Dark Curse;
Found Baelfire, however, he died shortly after, to save him
Constantly struggled between being good or evil, redeemed himself because of Belle's love
Sacrificed himself by magically pulling out his heart & putting into a dying Hook