Actually I think all media is biased in that they want to earn a buck or two. It drives media frenzies, making something out of nothing and giving Donald Trump too much airtime. Ratings.
There are biased news sources of course. FOX and MSNBC are both biased. I think FOX is more ideologically driven where as MSNBC plays the liberal station because it's a niche that wasn't previously filled in cable news. Both however sensationalize the news (just like CNN) to make a buck. The media, owned by huge corporations are biased to the dollar.
Do you even watch Fox News? Serious question. Have you ever watched Oreilly, for example? I've seen him lay the hammer on several conservatives when they have stupid things, or done stupid things. Is he conservative? Of course he is, but he is fair in terms of he has liberal guests on all the time, and he goes further in allowing them to say their piece than I would.
The only one who I would actually say is fully biased is Hannity. And that is his shtick.
As for the news itself, not the opinion shows, Fox News does the best job of the three of presenting the news without trying to insert their agenda into it. That is fact.