Ahhh - see your point.
To be honest, even knowing what minis are required will cause havoc with the spoiler aspect of your requirements...
There was a huge thread on the Wizards Website discussing minis requirements.
It also depends on when your DM will be setting the adventure - there was a wide range of opinions on that on the
boards - & that will prescribe which minis you use to some degree... e.g. clone troopers or stormtroopers...
You will be well served by making sure you have some 'generic' security force figures, (say 6), some Felucians, an AT-ST
(? - the 2 legged one...), plenty of various 'extras' for criminals, gangs, NPC others, as well as some force users & ships
for the space battles - it's Star Wars...so there have to be force users & space battles - right... ; )
To be honest, you'll need a wide variety if you want to model everything perfectly, so I suggest that you get a few more generics, including ugnaughts, neimoidians, noghri, as well a some beasties - mynocks for example.
Without reading through all 10 episodes again, & listing the HUGE number of NPCs
involved, that's the best I can do...sorry dude.