Link: https://reddit.com/r/NeutralPolitics
And its sister sub NeutralNews for news article discussion (same rules): https://reddit.com/r/NeutralNews
Both subs allow users to submit new posts and comments (but spend 2 minutes checking out the rules first).
However, on every thread I checked, about 70% of comments are deleted. That means that the noise is still there, but the mods are having to work nonstop to fight it and no doubt introducing their own bias as they do so.
I wish them luck and I'll keep checking these places out but I can't help but feel that by the time you're deleting 70% of all comments (and who knows what percentage of threads), you're fighting a losing battle.
Evidence and science is one thing. What you should do with it is another entirely. Every decision is a tradeoff. Science can't tell you what to value.