Who is a Polish politician that was also famous for performing Piano Concerto No. 4 by Anton Rubinstein?
Ignacy Jan Paderewski Ignacy Jan Paderewski, GBE (] ; 18 November [O.S. 6 November] 1860  – 29 June 1941) was a Polish pianist and composer, politician and spokesman for Polish independence. He was a favorite of concert audiences around the world. His musical fame opened access to diplomacy and the media.
Stanisław Małachowski Count Stanisław Małachowski, of the Nałęcz coat-of-arms (] ; 1736–1809) was the first Prime Minister of Poland, a member of the Polish government's Permanent Council (Rada Nieustająca) (1776–1780), Marshal of the Crown Courts of Justice from 1774, Crown Grand Referendary (1780–1792) and Marshal of the Four-Year Sejm (1788–1792).