Looking good.
Yea, give GH, and/or Fubar a try. Star Wars Miniatures is a classic go-to as well.
For GH, I think the Jedi and Vader should definitely get far bigger dice, e.g. D14 - D20, for them, and the emperor.
You can adjust for various levels of The Force skill, as time goes on, if desired, and/or to differentiate them.
As you mentioned, more wounds is another way to go too.
I think Darth should probably get at least five of those, if you don't give him a lot of saves when being fired at by blasters, or when in close combat with other Jedi.