“The Magnificent Seven”
Most action movies are centered on one lead badass, but “The Magnificent Seven” (not to mention the badasses, with Steve McQueen, Yul Brynner, and Charles Bronson among them. Hard to argue with a cast like that, especially since they somehow manage to not overshadow each other.
Master director Robert Altman was famous for his movies with big ensembles, and “Nashville” is arguably the best of the bunch. It follows a cast of around 30 characters to Nashville for a political speech that ends up turning deadly, then somehow inspirational. And every single one of the characters is as fascinating as the next.