Ray Duchamp, Ernst Schwitters, and MAX Ernst were three of the most influential figures in the Dadaist movement. RAY Duchamp was a French artist who is best known for his painting 'Nude Descending a Staircase'. Ernst Schwitters was a German artist who was a pioneer of abstract art and collage. MAX Ernst was a German painter and sculptor who was a leader of the Surrealist movement. All three of these men were key figures in the development of the Dadaist movement, which was an artistic and literary movement that sought to challenge traditional values and conventions.