One of my favorites that I return to often is "Honor Thy Father" (1973), made for TV. It's based on Gay Talese's book of the same name, covering Bill Bonanno's devotion to his father, Joe, and the "Bananna War" of the mid-Sixties. It has three big things going for it:
--Terrific cast, headed by Joe Bologna, Brenda Vaccaro, Raf Vallone and Richard Castellano.
--Excellent script by Lewis Carlino, which avoids nearly all the "honor" crap that Bill Bonanno loaded on Talese (and that he fell for).
--Directed by Paul Wendkos, who had lots of experience getting the most out of low-budget made for TV productions.

Excellent!