Thrawn

"I will start my operations here, and pull the rebels apart piece by piece. They will be the architects of their own destruction."

Quick Bio
By 2 BBY, Thrawn had been promoted to Grand Admiral and given the command of the Seventh Fleet due to his victory over a rebel insurgency at Batonn. He was then assigned to destroy the Phoenix Squadron located in the Lothal sector, which was a part of the growing rebellion against the Empire. His efforts were aimed at discovering the location of the rebel base which he eventually did find and attacked. The battle was a success and the squadron was mostly destroyed however the Spectres, an important cell of the rebellion and the Imperial traitor Kallus managed to escape. Moreover the Empire suffered major damages and Thrawn received a prediction of his deathfrom a mysterious Force-sensitive individual known as the Bendu.