Sedriss
Sedriss was an enhanced human who studied the Dark Side of the Force under Emperor Palpatine, and was later appointed one of the reborn Emperor's Executors. Before turning to the Dark Side, Sedriss had been recruited by the Imperial military but turned down because of his insolence and lack of respect for authority. Palpatine, however, sensed the innate evil in Sedriss, and gave Sedriss the chance to kill him if he could. Sedriss failed utterly, but Palpatine demanded his complete loyalty or else he would be killed. Sedriss agreed to become Palpatine's agent, realizing that the Emperor was a true superior. He was a massive human with spiked hair, and was unfailingly loyal to Palpatine. Even after the Emperor's death at Endor, Sedriss journeyed to Byss to await his master's return. His loyalty was rewarded years later when he became the first Executor, and the leader of the Dark Side Elite. In this capacity, Sedriss was the primary force behind restoring the Empire via Operation Shadow Hand. He gave the orders that launched the operation following the reborn Emperor's death. When Palpatine ordered him to detain Luke Skywalker on Ossus, Sedriss and Vill Goir both flew there in the Imperial Hunter Scourge One. Unfortunately for Sedriss, the ancient Jedi Master Ood Bnar captured him and reduced Sedriss to microscopic bits in an explosion of colliding Force energies.