I met

Peter Mayhew (Chewbacca)
Jeremy Bulloch (Boba Fett)
Ray Park (Darth Maul)
Michonne Bourriague (Aurra Sing)
Kenny Baker (R2)
Anthony Daniels (C-3PO)
David Prowse (Darth Vader)
Amy Allen (Aayla Secura)
Femi Taylor (dancer in Jabba’s palace)
Garrick Hagon (Biggs Darklighter)
Anthony Forrest (Fixer/Stormtrooper in Mos Eisley)
Matthew Wood (General Grievous voice)
Temuera Morrison and Daniel Logan (Jango Fett and Boba Fett)

I might be missing one or two more, can’t remember. I got pictures with all of them, as well as their autographs.

Updated:
Billy Dee Williams (Lando)
Alan Tudyk (K2SO)
Ian Mcdiarmid (Emperor Palpatine)
Paul Bettany (Dryden Vos)