Looking at
https://en.wikipedia.org/wiki/Wikipedia:Reliable_sources/Perennial_sources :
ABC News, Al Jazeera, ADL (except for Israel--Arab-Pali issues), The Atlantic, BBC, BuzzFeed News, CBS News, Climate Feedback, CNN, GLAAD, GQ, The Guardian, The Hill, HuffPo (with caution about politics), LA Times, Mother Jones, MSNBC, The Nation, NBC News, The New Republic, New York magazine, NYT, NPR, PBS, People, Playboy (only the articles, of course), Politico, PolitiFact, Snopes, SPLC, Time magazine, Vanity Fair, The Village Voice, Vogue, and WashPost, are accepted sources.
ADL (on Israel--Arab-Pali issues), Blaze Media, Breitbart (banned), Change.org (banned), The Daily Caller, Daily Mail, The Epoch Times, Examiner.com (banned), The Federalist, Fox News (politics & science, talk shows), FrontPage Magazine, Gateway Pundit, The Heritage Foundation (banned), Jihad Watch, LifeSiteNews, Media Research Center, Newsmax, One America News Network, The Post Millennial, Project Veritas (banned), The Truth About Guns, The Western Journal, and Zero Hedge are non-accepted sources.
The bias went in before the information got posted. GIGO.
Some of the non-accepted sources sources should, IMO, have been listed as yellow (use with caution), e.g. Gateway Pundit and Jihad Watch, but sometimes they report stories the MSM don't/won't.
Natural News is, deservedly, banned.