Koloth

Descended from Klingons affected with the augment virus, cured by the 2270s
2260s: Achieved the rank of captain, assigned as commander of the IKS Gr'oth
2268: On a six-month mission to patrol the border of the Klingon Neutral Zone;
Spent shore leave at the Federation Deep Space Station K-7
2269: Transferred to the IKS Devisor as its captain
2289: Represented the Empire in negotiations at the Korvat colony with the Federation
2280s: Part of the team that stopped the Albino from raiding Klingon colonies;
Son was later infected with a genetic virus by the Albino & died
2370: Attacked the Albino with Kor, Kang & Dax, got vengeance for his son’s murder, fatally wounded