Sorry folks, an evening out will prevent me from making a long post. Instead, I invite you to read some information on Commander Cody, the Republic clone leader from the movie Revenge of the Sith.
Cody was part of a cloning program that did not remove free-thinking and invidualistic traits from their personality. As such, he and others were well suited for leading the other, more impressionable clones.
He loyally served under legendary Jedi Master Obi-Wan Kenobi right until the execution of Order 66.