Complex sentence: Emil Ruder (1914--1970), Swiss typographer and graphic designer, who with Armin Hofmann helped to found the Basel School (Schule für Gestaltung Basel) and a graphic style known as the Swiss Style.
Split into simpler sentences: Emil Ruder (1914--1970) was a Swiss typographer and graphic designer. With Armin Hofmann, Ruder helped to found the Basel School (Schule für Gestaltung Basel) and a graphic style known as the Swiss Style.