[padobson]

You sort of answered your own question. People looking for a left-leaning narrative have (C)(MS)NBC, CNN, ABC, NBC, CBS, and PBS. People looking for a right-leaning narrative have Fox(News)(Business).

Fox has consolidated the right-leaning audience. Anyone who complains about them should always follow the complaint asking why there aren't more conservative news networks to keep them honest.

[Wowfunhappy]

Most of these networks (CNN, CBS) aren’t actually left leaning, except in comparison to Fox. Consider how much time they gave to stories like Hillary Clinton’s email server during 2016. They didn’t focus soley on Benghazi for a year, but that shouldn’t make a network “left-leaning”.

[leetcrew]

left and right have always been relative terms. saying CNN isn't "actually" left leaning is like saying California isn't really west because Hawaii exists.

[Can_Not]

If those terms are relative, then according to the list in the comment above, Fox is far right and the rest are center.

[arnoooooo]

That you can think these networks have left-leaning narratives just goes to show how much right-wing politics have become the norm.

As another commenter pointed out, the only thing that can be tought of as "left-wing" with them is that they are to the left of Fox News.

To go back to basics, left means distributing profits more equally, having built-in methods of solidarity, and giving power to the people (all of them).