Toleph-Sor

Toleph-Sor was a semilegendary "pirate-general" who lived during the early days of the Old Republic. It was said that he was responsible for building one of the treasure storehouses of the Presidential Palace on Coruscant.

Whether that means he conquered Coruscant at some point, was once leader of the Republic, or was just hired to build the room - if he in fact did - is unknown.