(The Crucible) Was John Proctor a man who values morals?

Yes. Even though he did have an affair with Abigail, his value of morals ruled out in the end when he chose to reveal the fact to the entire town, during a time in which adultery was the most horrendous crime that one could commit. John Proctor gave away his untainted reputation to save his family and his friends from the outrageous craze of finding 'witches', or if you find the deeper meaning behind it, 'communists'.