6. Ross Webster (Superman III)
Villain from the previous movie: General Zod, Ursa, Non & Lex Luthor (Superman II). Gene Hackman, who had previously played Lex Luthor in this Superman franchise, sat out Superman III due to his problems with the producers and was, in effect, replaced by Robert Vaughn's uninspired villainous Ross Webster as the intellectual threat to Christopher Reeve's Superman. The character was poor in comparison to the classic Superman rogue Lex Luthor and his aim of monopolising the world's coffee industry by destroying Colombia's crops never really had that necessary level of threat required in a Superman movie (understatement of the year right there). The fact that he recruited frickin' Richard Pryor (playing computer hacker Gus Gorman) to assist him just added to the debacle. Of course this movie also saw Superman split in to two beings, thanks to some synthetic Kryptonite, which fought each other - creating a sort of crappy version of Bizarro - but it was poorly done and wasn't really a 'villain' as such, more two halves of Clark Kent's personality. And none of the characters in this movie came close to the physical threat of Terence Stamp's General Zod and his Kryptonian cronies, Ursa and Non.