unitl ROTJ, r2d2 and c3p0 were just as iconic as vader. The PT hurt the droids, especially 3PO. Maybe its a stretch but I still say 4. if this was 1980, it would have been 8 ;) It was a modern day Wizard of Oz.

the great thing about yoda was you had this sequel to a film that was already one for the ages with all kinds of famous characters and he becomes just as famous and carries a good part of ESB.

and it was Jabba - not palpatine - that became another classic character.

boba fett was big at the time but I maintain that he didn't become what he is now until the early 1990s.