TBH I thought the whole show was great the first couple of seasons then got weaker and weaker throughout. I’d say the same (disappointedly) of Narcos.
Compared with other multi-season gangster epics of recent years, Peaky Blinders, which I actually thought was dogshit at first but I was persuaded to keep going back to it and it got better as it went along, and Boardwalk Empire, which was just excellent beginning to end.