Just realised something...
"There must always be a Darth Traya."
And we got a 4000 years spanning Comic arc that has it's own Betraying Jedi!
Celeste Morne from the Knights of the Old Republic series!
..who starts a war and turns DS (watch the eyes)
..and is still alive (although in statis) when Darth Vader finds her:
PS: I still can't get those url-tags to work. It's [url= *insert link*[ /url ]text that shows up [/ url] right? (Of course without all the spaces in between)