The artist who painted "Irises", "Sunflowers", "Red Poppies", and "Pink Roses" is Vincent van Gogh. Vincent van Gogh was a renowned Dutch painter famous for his post-impressionist works. His vibrant color palette and expressive brush strokes have earned him a lasting legacy in the art world. The listed paintings are amongst van Gogh's most celebrated works, showcasing his unique style and mastery in capturing natural beauty.