Some of the most notable French painters from the 19th century include:
Claude Monet - A pioneering figure in the Impressionist movement, Monet is famous for his series of paintings depicting water lilies and other nature scenes.
Pierre-Auguste Renoir - Another leading Impressionist painter, Renoir is well-known for his vibrant light and saturated color in paintings, especially those depicting people in candid composition.
Paul Gauguin - Though initially associated with Impressionism, Gauguin is better known for his Post-Impressionist works, characterized by bold colors and strong contrasts.
Édouard Manet - A pivotal figure in the transition from Realism to Impressionism, Manet's works such as "Luncheon on the Grass" and "Olympia" are renowned.
Edgar Degas - Best known for his works capturing dancers, Degas is another prominent figure in the Impressionist movement, though he preferred to describe his approach as more Realist.
Henri de Toulouse-Lautrec - Known for his depictions of Parisian nightlife, Toulouse-Lautrec's art captured the vibrant cafe culture of the city.
Camille Pissarro - Recognized for his influence on Impressionism as well as Post-Impressionism, Pissarro's work focused on landscapes and rural scenes.
You can find more details and examples of these artists' works on resources like The Collector and Wikipedia.