I would personally say NPR, BBC, Reuters, and the Associated Press. The BBC is not afraid of where its funding will come from, and is also not biased about American politics or culture, because it is British and very tradition bound. NPR is also quite balanced, because it reports the same whether or not its funding sources are threatened. They also take pains to be neutral an give a deeper view of stories they put on the air or the web. Reuters and AP are basically fact-oriented, and take pains to put absolutely no spin on their information. They are already on to the next item before analysis is done, for the most part.
The major networks newscasts are also usually non-partisan as well, even to some extent Fox, but the problem lies in conflating the pundit and rant shows that they also put on that are usually somewhat slanted and inaccurate. People think of those as “news,” because it has a thin veneer of the parent organization attached to it, but in reality they are opinion shows that are not to be assumed as the same level of journalism.