He `` acted as a father figure not only to the Impressionists '' but to all four of the major Post-Impressionists , including Georges Seurat , Paul Cézanne , Vincent van Gogh and Paul Gauguin .
He acted as a father figure to the Impressionists and , in varying degress , to all four of the major Post-impressionists including Georges Seurat , Paul Cézanne , Vincent van Gogh and Paul Gauguin .