Khamul

Khamûl was the second most powerful Nazgûl after the Witch-king of Angmar was. After the death of their leader, Khamûl took over as the leader, before his demise when Sauron was destroyed for good.
He was a king of Easterlings during the Second Age, and he was one of the nine Men to whom Sauron gave one of the Rings of Power. Like the others, he became a powerful sorcerer and ruler until he eventually faded into a Wraith and his will was surrendered to Sauron. By S.A. 2251 he was already one of Sauron's servants.
It was said that, after the Witch-king, Khamûl was the most ready to perceive the presence of the One Ring, but is power was most confused and diminished by daylight.
In T.A. 2951 Sauron returned to Mordor and declared openly to his enemies. Khamûl and two other Ringwraiths were sent to the fortress of Dol Guldur, with the former taking command.
During the War of the Ring he was one of the Ringwraiths who entered the Shire, and asked Hamfast Gamgee for "Baggins". However it was the day after Frodo Baggins had left Hobbiton, and he then pursued the Hobbits to Bucklebury Ferry in the Shire some days later. He was also one of the six or nine Ringwraiths, led by the Witch King, that followed Gandalf on Shadowfax and attacked him at night on Weathertop; they were repulsed after a violent fight on 4 October, and Frodo and Aragorn saw the lights of that battle from their camp. The Witch King and Khamûl remained watching Weathertop (waiting for the Ring Bearer to come) for two days thereafter, along with three other Wraiths. After the Ringwraiths find Frodo and the Hobbits on Weathertop, they are confronted by Aragorn after the Witch-king stabs Frodo, at which they are forced to flee. After they're repelled by Arwen, they take on fell beasts as mounts.
Khamul takes part in the Battle of the Pelennor Fields, killing Gondor's soldiers. After the Witch-king's death, he retreated to Mordor. He and the remaining Nazgul attacked the Army of the West at the Black Gate on his mount before fighting the Eagles. Following the destruction of the One Ring, Khamûl perished with the rest of the Ringwraiths.