John French Sloan, The Wake of the Ferry No.2, 1907
John French Sloan, The Wake of the Ferry No.2, 1907
Ben Shahn, 1932, The Passion of Sacco and Vanzetti
Andrew Wyeth, 1979, Night Sleeper
Henry Ossawa Tanner, 1894, The Thankful Poor
Chop Suey by Edward Hopper, 1929
From the National Gallery of Art: These fashionable women are dining at a modest Chinese restaurant not unlike one the Hoppers frequented. Characteristically, Hopper depicts a moment before or after the main event—here, the meal—takes place. Also typical is the isolation and ambiguous relationship between the figures: it is not clear whether the dining companions are even looking at or conversing with one another. Although this is clearly a figurative work, Hopper flirts with abstraction. The women are surrounded by a balance of geometric forms: the angular table between them, the layers of rectangles that animate the foreground window, and the blue and yellow patches visible through the far window that suggest shafts of light on the adjacent building.
ART TIMELINE: 1910
Blue Snow the Battery by George Bellows, 1910: realism
Landscape with Church by Gabriele Munter, 1910: expressionism
Self Portrait by Pyotr Konchalovsky, 1910: Jack of Diamonds, social realism
ART TIMELINE: 1924
Mandolin et guitare by Pablo Picasso, 1924: Cubism, abstract art
House at the Fort, Gloucester by Edward Hopper, 1924: social realism
Horizontale by Wassily Kandinsky, 1924: expressionism, abstract art

The Face of War by Salvador Dali: surrealism

Grey Tube Shelter by Henry Moore: official war art

Office at Night by Edward Hopper: social realism
January by Grant Wood, 1940
Supermarket by Ben Shahn, 1957. I came across the work of Shahn in the Vatican Museums of all places. His work is quite varied in style with images of simple linework, such as Supermarket, and bright bold realist paintings, (I would describes his work in terms of other artists as being a mix of Egon Schiele and Max Beckmann).
Discussion by Thomas Hart Benton, 1969