As a news consuming public, our best option seems to be to not use Google as our primary news filter. Long term, we probably need an entirely different kind of news aggregator that isn't under the control of any single entity as you're suggesting, but I'm not sure what that would look like and how it would work.
Your reader polls those feeds and uses some weighted algorithm to produce a set of custom news, possibly by consulting a public index like Google (or even a news outlet directly, redirect in to it with the search terms of choice).
It's still an echo chamber, but if you've got fake news pushing fiends on the list of sources you trust you've already got problems.
Sinclair Broadcast Group is doing basically this already, just in a low tech way and requiring its local TV stations to promoting their political agenda.
There has always been a definable difference between fact and fiction. Both have a place on the net but where fiction masquerades as fact with the intent to decieve, we have a duty to use all the tools at our disposal to destroy that ruse and choose more factual sources on which to base our decisions.
I for one welcome our new news overlords.
Using the scientific method, meta-studies and suchlike our species has built an enormous corpus of knowledge, I'm happy to let that evolving concensus be the basis of our decisions.
For example the fact that vaccines do a more good than harm by an order of magnitude is no longer up for debate. There is a lunatic fringe who disagree, their unfounded fiction should not be shown to curious first time parents on google.
To insist that everyone can pick and choose reality and that we should all be wary of "facts" is to cause real harm.
Same with advertisers. How long until the recent "advertiser-friendly" policies, which have been implemented for Youtube and stop monetization for any Youtuber that might offend an advertiser in any way, will be implemented for news, too?
Google will one day be the arbitrators of news. If it doesn't fit in their world view, whether it's true or not. Will be removed from the results.
I think now is the time to setup a different model and remove their monopoly. Internet freedoms are at stake here.
Do no evil? Yeah right.