Nephthys
And Caedus wasn't stupid. He was a whiny little ***** but he still manipulated his way to ruler of half the galaxy in under a year.
I'm not sure that feat alone redeems his Sith-induced incompetence. He removed Omas from power simply by altering a legislative document that wasn't carefully read and ratified by an eager Senate, IIRC. Clever, certainly. But when we look at his behavior in the full context, he was remarkably inept.
Originally posted by truejediDesann didn't affiliate with Sith though, so he doesn't count. And he think he could have very well won if the Doomgiver hadn't blown up.
Where was Caedus really stupid? I mean, he made a lot of mistakes (cause Luke was all up in his visions...) but was anything he did as stupid as Desann.