Answer: The main post-impressionist painters were Paul Cezanne, Paul Gauguin, Vincent van Gogh, Georges Seurat, Henri Toulouse-Lautrec and Henri Rousseau ('Le Douanier').
Aiming to shake up the contemporary art world, this group of stylistically dissimilar artists—including Paul Cézanne, Paul Gauguin, Vincent van Gogh, Georges Seurat, Henri Toulouse-Lautrec, and Henri Rousseau—formed the Post-Impressionists.