Salvator Rosa was an Italian Baroque painter and printmaker from the 17th century. His wild landscapes and satirical portraits paved the way for romanticism and dark subject matter in fine art. He was active in Naples, Rome and Florence in paint, etchings and playwriting. His unorthodox subject matter (Saul and the Witch of Endor) brought him the label of "Perpetual Rebel".
"In a time when artists were often highly constrained by patrons, Rosa had a plucky streak of independence, which celebrated the special role of the artist. " Our wealth must consist in things of the spirit, and in contenting ourselves with sipping, while others gorge themselves in prosperity". He refused to paint on commission or to agree on a price beforehand, and he chose his own subjects." via https://en.wikipedia.org/wiki/Salvator_Rosa