Davros

An Emperor Dalek was usurped by Davros, who refered to it as "the upstart". (COMIC: Nemesis of the Daleks, Emperor of the Daleks!)

Behind the scenes

 * The design of the Dalek Emperor's casing was a combination of Davros' Imperial Emperor casing from Remembrance of the Daleks and the Golden Emperor from The Dalek Chronicles.