Vargos (Revelation of the Daleks)

President Vargos was the leader of a united planet organisation that included the planets Earth and Necros. When his wife died, her funeral was to be held on Necros at Tranquil Repose, afterwards her body would be placed in suspended animation until a cure for her death could be found.

When the funeral was to take place, however, Tranquil Repose had been taken over by Davros, who called himself the Great Healer and was creating the Imperial Daleks, a new generation of Daleks. Though his wife's body was neither used as food or turned into a Dalek, Peri Brown was able to radio his ship and warn him about the Daleks.

Kara had planned to overthrow Vargos so that she could control the food supply for the whole galaxy. (DW: Revelation of the Daleks)

Behind the scenes
In Eric Saward's original script, Vargos was the president of the "Federation of the Ten Planets", but no such organisation was ever said on screen. If it had been, the Federation would likely be made up of the Sol system (nine planets) and Necros (10th).