I guess different folks care about different aspects of a conversation.

Some people take offense when you correct their spelling, others embrace that.

To me, it is very vague what "toxic" means. The Wiki article you linked talks about counterproductive infighting - well, if you're trying to get to the truth, the pyramid is a stab at showing the way towards finding truth.

Ethics and professional conduct - how offensive is too offensive for a joke? do we all have to act like professionals? do we have to refrain from insults? am I not allowed to say person X's argument is dumb? How about person X being dumb themselves?

Even using the wrong gender offends some people. Others get offended from being asked to use a specific gender.

Many people have many definitions - some might be seeking emotional comfort, or politeness, or a specific form or tone.

I am afraid that, bar concrete examples of what bothers you, I can't find a community for you. But it might be that there are none that satisfy your definition of a "non-toxic" community.