Moderate Republicans are, were, good things. I use the past tense "were" because as they became rarities, the centrists' chief function was preserving majorities in Congress for their radicalized party.
New England used to send lots of moderate Republicans to Washington. No more, and it's not because there aren't attractive Republican candidates. It's because the ones representing liberal-to-moderate regions became scapegoats at which party extremists directed their primal screams.