Bonanza is the second most successful western of all time and continues to run in syndication today. The show follows the weekly adventures of the Cartwright family in a fictional 1860s backdrop. Bonanza was known for diving more into character development and the relationships between characters more than the typical western of its time, which helped it stand out!
A common theme on this list, Bonanza gets a lot of credit for how the show addressed racism and presented a humanistic prospective on social issues. The show was based in the Ponderosa and gave fans lasting memories for generations. It ran from 1959-1973 and would have lasted longer if not for a poor scheduling decision by NBC. The show continues to run in syndication and spawned 3 sequel TV movies!