Novels set in the Old West

I’m a big fan of serialised historical fiction novels such as Bernard Cornwell’s Sharpe, Saxon and Grail Quest series, Conn Igulden’s books on the Mongol and Roman Empires and Anthony Riches’ Roman series.

Are there any similar series set in the Old American West? I’m really fascinated by this period of history and would love to dive into a series that can teach me more about the period whilst simultaneously telling a great story.