There was a brief resurgence in the 1980's headed up by producer Tony Brown. Known as the "neo-traditionalists" companies started signing people like Patty Loveless, Dwight Yoakum, Randy Travis, Lyle Lovett, Allison Moorer, Steve Earle. Lee Ann Womack was the sort of magic unicorn that labels were looking for; someone with traditionalist authenticity who could also have major pop hits.
In the 1990's the focus seemed to shift somewhat towards "Americana' with folks like producer T-Bone Burnett, Alison Krauss, Gillian Welch, Kasey Chambers, etc. Nowadays, you might still find some good stuff out there but it might take some digging. Nashville is all about making money with the middle of the road, pop rock they are intent on marketing as the new country; identical sounding, auto-tuned voices perfect for beer commercials and SUV ads.