Hellman's play Another Part of the Forest serves as a prequel to The Little Foxes; though it is much less well known, it offers a great deal of context for the Hubbard siblings and their deviance.
Much more frequently performed and taught is Tennessee Williams' A Streetcar Named Desire, The Glass Menagerie, and Cat On a Hot Tin Roof, all of which deal with complicated family dynamics against the backdrop of a post-Reconstruction South.
Family business and corruption are at play in Arthur Miller's All My Sons and A View From The Bridge.