Poet Henry Wadsworth Longfellow famously wrote, “In character, in manner, in style, in all the things, the supreme excellence is simplicity.” And one could argue that the same is true in automotive design. American car design of the 1950s-1970s was beloved for its flamboyance; here are five post-war cars that swam against the stream of fins, scoops, chrome and decals and were memorable for their elegant simplicity.