Which designer wad not one of de stijl movements leading artists?

One designer who was not part of the De Stijl movement is Coco Chanel. While De Stijl, characterized by its geometric forms and primary colors, focused on abstract art and architecture, Chanel was known for her contributions to fashion, particularly in women's clothing. Her work emphasized elegance and simplicity rather than the geometric abstraction central to De Stijl. Thus, her design philosophy and output diverged significantly from the movement's principles.