Barrett would be great, Hardiman less so. According to a study I have read, he is only slightly more conservative than Justice Kennedy and less conservative than Chief Justice Roberts. He is not an originalist like Scalia or Thomas.
We don't need another "swing vote" on the court! Absolutely NOT! Put a swing vote on the court and the country is lost, period. The time to return to a Constitutionally based Government is NOW, an opportunity like this may never come along again.