Dalagra

Dalagra was the last independent King of the Gorons prior to their enslavement by the Volvagians.

Ancient Age
Dalagra ruled over the Gorons as they were at war with the Volvagians and Lizalfos for control of the Death Mountain Range. At some point in his rule, the Volvagian Empire, led by Dakkon, allied with the Lizalfos from Death Mountain and crushed the Gorons, killing Dalagra and enslaving his surviving people.

There wouldn't be a successor to the title of Goron King until Darunia, who lead a rebellion against the Volvagians with the aid of the Kingdom of Hyrule and their Sheikah agents.