I haven't seen any of the Disney Star Wars films. Not that I don't plan to eventually see them, but since the series is no longer written or sanctioned by Lucas, and therefore no longer part of the original canon, there is no longer an urgency to see any new Star Wars film. They are just more big budget visual effects films that may or may not have a good plot. So my picks come from the original trilogy and the prequel trilogy, with the two Ewok telefilms and Holiday Special characters also under consideration ( but ultimately rejected. ) Haven't gotten around to seeing any of the animated SW stuff, and very little of anything else from the SW expanded universe, so the characters on my list are just from the live action films.
#1 Darth Vader
#2 Yoda
#3 Han Solo
#4 Obi Wan Kenobi
#5 Luke Skywalker
#6 Emperor Palpatine
#7 Princes Leia
#8 Lando Calrissian
#9 Chewbacca
#10 Admiral Ackbar
#11 C3P0
#12 Elan Sleazebaggano
#13 Count Dooku
#14 Darth Maul
#15 Boba Fett
#16 R2D2
#17 Jabba The Hutt
#18 Greedo
#19 Max Rebo
#20 Grand Moff Tarkin
#21 Ponda Baba
#22 Mace Windu
#23 Figrin D'an
#24 Wedge
#25 Nien Nunb
Too bad there was no side list for the worst Star Wars characters, so we would have a place to shove Jar Jar Binks and Chef Gormaanda.