These are some of my favorite artists, with representative works. Some are just favorite paintings by artists I'm not overly fond of, such as Picasso. I have other favs but these will do for now. I'm including the dates and current whereabouts of these masterworks when available.
Sandro Botticelli's "La Primavera"

Thomas Eakin's "The Wrestlers" (1899) The Philadelphia Museum of Art

Caravaggio's "David and Goliath"

Mary Cassatt's "Self-Portrait" (1878) Metropolitan Museum of Art at New York

Pablo Picasso's "The Musicians"

Salvador Dali's "Crucifixion of Christ"

James Rosenquist's "F-111" (1964-5) Guggenheim Museum of Modern Art
Vincent Van Gogh's "Sunflowers"

Andy Warhol's "Flowers" (1970)