If Boba Fett wins the award for looking cool but being dumb then close behind him will be the Imperial Stormtroopers. I do love these guys, they look great but in terms of smarts and using them they've not a lot going for them. Surely the worst shot (baring Greedo in the new releases, he can't even have blaster fire come out in a straight line) in the whole Empire, they basically win any battle by sheer number, all that laser fire well something is bound to hit.
Do I mention the legacy of Jango Fett, cloning and the banging head incident… no lets leave it. Back in '77 the Stormtrooper banging his head was pure and simple a fun mistake to look out for. Solo and Skywalker knew how cool the Stormtroopers looked too and wasted no time jumping into an outfit, poor old TK-421.