Looking for good movies about dynastic upheaval, empire and legacy.

I'm working on a project where the main conflict revolves around power plays inside a major company, including two major conflicts - 1) Between the owner/father and his son he's grooming but is unsure about the morality of his father's business, and 2) A higher-up in the company trying to position himself to take over and steer them in a different direction. The son is tempted to join him.

That's really bare-bones shit, but the point is that I'm looking for other movies about power plays and particularly movies about empire, where the aging ruler is trying to preserve his dynasty but the new guard ain't so sure.