To continue your list..
8. Biggs Darklighter or Wedge Antilles in pilot suit
9. Owen Lars or Beru Lars
10. Rebel Trooper (possibly with removable helmet kind how they did Zoot's hat in Muppets 2)
11. One of the band members from the Cantina (which could have an instrument)
12. Chaser should be the Death Star. I saw someone do a custom of it that was pretty neat so with enough creativity you could make a sweet one.