Most of the synonyms for self-righteous are deprecating.
One of the wonderful things about the English language is that most ideas have a word for the positive connotation, and a word for the negative connotation.
I'm trying to find the positive connotation for someone's behaviour being self-righteous. (In the context of trying to work with them in a team).
My question is: What's the polite way of describing someone's behaviour that appears to be self-righteous?