A Raisin in the Sun
by Lorraine Hansberry
Willy never shows up onstage, but he plays a significant role in the Youngers' story. And by "significant," we mean, "very, very negative." After convincing Walter that investing in the liquor store is a great idea, Willy takes Walter's money and runs. It is because of the thieving Willy Harris that Walter's dream is deferred.