This is one of your fairer posts. Incidentally, a few years ago I thought CNN was the most balanced news network. They found that being in the middle is not the proverbial sweet spot, but rather a place where they got squeezed by Fox News and MSNBC in competition for viewership.
It should come as no surprise when discussing political bias of news networks that the discussion is biased. You wrote about Conservative bias: "It's the same partisanship that now has us questioning the affiliation of the FBI." Since you brought up the recent events with the FBI, it provides an excellent example of bias on bias or perhaps better described as facts be damned.
The Inspector General (IG) released his report on the FBI's handling of the Clinton server investigation. He extensively criticized Comey and his various lieutenants on how they handled the investigation. So of course Fox is beating the drum that the FBI is biased and its executive leadership was partisan. The liberal media is saying it is much ado about nothing. In concluding his report, the IG said there was no bias.
Based on the above, it might be fair to say that Fox is guilty of extremely biased spinning and CNN, MSNBC, NYT, WaPo are reporting facts. But, hold on! I'm not stupid. I can think for myself. The IG spent months and months on a 500 page report to say Comey & Co. did systemically stupid things in the Clinton investigation, but the FBI showed no bias. Peter Strzok (FBI agent) in a FBI email to a colleague commented on the Trump campaign "We'll stop it." This email was previously redacted by the FBI claiming a national security risk. (Oh, brother.) Strzok was a key FBI figure in the Clinton and Russian Collusion investigations.
You might still counter my belief that the FBI was biased based on the above info alone. However, what is particularly damning is that FBI employees have been fired and demoted and their are more firings to come over the Clinton investigation. I'm not trying to change your mind, but I'm saying you don't need Fox News, CNN, MSNBC or the Inspector General to tell you if the FBI had bias. You should be able to form your own opinion based on the facts.