6. Grand Admiral Thrawn
The Empire's greatest general, Grand Admiral Thrawn was sent to the outer rim by Palpatine to explore threats in the Unknown Regions and was unaware of the Empire's defeat at the Battle of Endor or the formation of the New Republic. Upon his return, he united the fragmented empire into an unstoppable war machine and pushed the New Republic to the brink of collapse. However, in the middle of a vital battle, he was assassinated by his bodyguards, effectively ending the imperial campaign and sending the Empire into an irreversible death spiral. Thrawn's unmatched abilities in combat earned him a reputation as the smartest tactician and strategist in the galaxy, routinely turning impossible situations into crushing victories and besting the greatest minds of the New Republic. Were it not for his assassination, he probably would have established a new Galactic Empire with himself at the head. In addition to his abilities, Thrawn is charismatic, intelligent, sophisticated, and eloquent, essentially the perfect villain. Although the new series will definitely not feature Thrawn, he would be an excellent choice as he is an extremely well written character who is undoubtedly the best Expanded Universe creation.