Isildur

Isildur was the son of Elendil, the High King of Gondor and Arnor. Isildur and his brother Anarion jointly ruled Gondor in the South, while their father dwelled in the North. During the War of the Last Alliance, Isildur cut the One Ring from Sauron's hand, but he refused to destroy it. Isildur was later killed by orcs and the Ring was lost in the Disaster of the Gladden Fields for nearly 2,500 years. His refusal to destroy the Ring allowed Sauron's spirit to endure and ensured that he would remain a threat to Middle-earth for years to come, but his bloodline survived in the Dúnedain of the North and his heirs would help end Sauron's power in the War of the Ring.