I'm not sure what exactly the ranking should be...but the media is owned by large corporations...which don't have any morals or anything, because they're not people, unless you ask the republicans. They are purely for profit.
There are too many questionable things these days to say the media isn't copy-editing stories to manipulate opinion. They change a word here or there, and it completely changes the slant of the story. There are tons of studies out there about their wording and the slant of different outlets. I don't really know why headlines want us all to hate black people, or think women in power are crazy whackos, or why different candidates are "un-electable" before debates even happen...but that's what they do. Pretty much every news media slants public opinion and even personal beliefs, slowly changing how you think, the very definition of propaganda. They do a way better job than historical propaganda though.
I do sometimes wonder how it's done though.
The left actually WANTS women to be discriminated against and sexually harassed so that the women will believe that they NEED the government to take care of them. Then, the Democrats take power and use tax money to support fake news propaganda and perpetuate the cycle. They don't care that women suffer.
You got the wrong layer for the conspiracy. Democrats and Republicans are just doing their job, talking about shit, and getting paid by lobbyists. The lobbyists are paid for by the corporations, ensuring if anyone is likely to get their way, it's not the Democrats or the Republicans, but the corporations. It's just a fight for which of the corporations will get their way.