The Cast is Exceptional
I mean look at these two!
Grace and Captain Chesterfield
Frontier is an incredible show. It takes the best parts of shows like Vikings, Black Sails, and Game of Thrones and breaths new life into a time period of history that is typically glossed over. Not only are all of the aforementioned characters worth watching for, but the secondary characters also bring so much to the table. They have actual First Nations and Native American actors.
There is actually very little romance in the series (aside from Michael and Clenna) and the focus is more on the politics, the tribe relations, and how incredibly shitty the British are to the Cree, how brutal the fur trade was. It's all very complex and very well done. My only complaint is that sometimes their accents are a little wonky, but you get used to them once you get sucked into the characters and their stories.