She could have helped Obi-Wan Kenobi as the Chief Librarian of the Archives but her apathy helped kickstart the Clone Wars and eventually the fall of the Republic instead.
As cool and badass as this cowboy-inspired bounty hunter is, Cad Bane is also a cold, evil bastard known for doing one thing extremely well — kidnapping children.
From "The Clone Wars" to "The Bad Batch," Bane was hired to kidnap Force-sensitive kids so Darth Sidious (and later Royce Hemlock) could horrific experiments on them.
This power is what Palpatine used to deploy a Grand Army of the Republic, start the Clone Wars, change the constitution, declare himself Emperor, and basically ruin everything.
"The Clone Wars" introduced many new villains, but arguably none as cruel, ruthless, and evil as Pong Krell, a notorious general known for getting results.
A character who initially seems like nothing more than a harsh commander takes a dark turn when he purposely devises disastrous battle plans to decimate his own battalions.
All he wants is validation from the Empire. He is just an opportunist, a loser willing to sell out his soul, his friends, and his mother if it means his bosses praise him.