(I guess we could say that there's a bias in favor of good sports news and against good political news.)
When trying to look for unbiased news, it's useful to see what the filters actually are, and the basic business model of media corporations. Prof Bob McChesney is knowledgeable, and even has a radio program about it. http://www.robertmcchesney.com/
The typical analysis is that the business press often has the best coverage, as they need a tolerable view of the world. For example, at least pre-Murdoch (I don't what people think now), the Wall St Journal was considered by critics to be be informative, aside from the over-the-top editorials. And in the New York Times, they recommend you read the articles starting from the ends (rather from the beginning), as editorial filters are loosest there.
The usual recommendation is not to worry so much about "biased news", and instead consume media with an awareness of the biases.