An important point, I think: The propagandists, most prominently today the News Corp outlets such as Fox and the WSJ, want to portray the whole world as ideologically driven. It innoculates their followers against anything anyone else can say (e.g., 'it's all left-wing propaganda, don't even bother') and justifies their own propaganda.
But everyone is not ideological. MSNBC is, at least it was the little I saw of them awhile ago, maybe NPR is, but I disagree that the rest are on the left. They are mostly straight-ahead journalism without significant ideology (though of course nothing is perfect in the world, and I'm omitting the unconcious ideology of the US popular perspective that people like Chomsky observe.)