Kor

Kor is a Klingon commander and one of the Empire's most celebrated warriors. In The Original Series episode "Errand of Mercy" he occupies the planet Organia and faces Kirk until the Organians halt the war. Over a century later, in Deep Space Nine, he joins Kang and Koloth in "Blood Oath" to avenge their godsons with Jadzia Dax, then searches for the Sword of Kahless with Worf. Ageing but unbowed, he dies in "Once More Unto the Breach", single-handedly holding off a Jem'Hadar fleet to save Martok's ships.