General Grievous.

The cyborg general of the Separatist droid army is one of my favorite characters of the show and of Episode III. The cat and mouse game he plays with Anakin and Obi-Wan throughout the series was an entertaining subplot in Clone Wars.

Clone Wars Season 7

Don’t forget – Palpatine is a prisoner aboard Grievous’s command ship the Invisible Hand at the start of Revenge of the Sith. The Jedi-killing droid commander therefore must factor in the show’s final season. Here’s hoping we see Palpatine’s kidnapping and Grievous’s role therein.