The Dirty Dozen and Oh brother where art thou. I’ve watched both a hundred times.
Oh brother where art thou
Had never heard of this movie til I moved Down South. It’s a cult classic around here. The kicker for me was the Ku Klux Klan Rally. The music and choreography - breathtaking.
Both good ones, but I don't consider them lesser known. "O Brother" is *almost* as funny as "The Big Lebowski" (both made by the same guys).