The decline of Fox News is due solely to one or more of Murdoch's sons taking over the management of the network. They are liberals. Another event a few years ago, an arab became the 2nd largest stock holder of the network. Their tone changed the moment that happened, and Fox's rhetoric regarding muslims went completely soft.
One America News Network OAN is a true conservative network, and I believe they present the news with no bias. And they present 2x or 3x the news stories, often things never mentioned on other networks.
Liz Wheeler, on a program called Tipping Point on OAN, is the best news program anywhere. Liz is the sharpest news person in the USA. It's on at 9 PM Mon - Fri.