I wanted so badly to have Jorus C'Baoth to be the big villain in the PT, besides The Emperor and eventually Anakin, but then I remembered how he died in the Outbound Flight program before The Clone Wars. I'm still trying to fit him in Episode I somehow, but I don't see how it'll work.

Any thoughts on this to help me?

I definitely want an Anakin who starts about Luke's age in Episode I and ends up middle-aged by III. Furthermore, I want to try and effect an older Empire. Obi-Wan definitely will be old enough so that he ends up in his late 70s or early 80s by the time of the original Star Wars film.