It also has the best episodes in which the heroes have to do evil shit OR are accused of having done evil shit. "The Darkness and the Light" is underrated. You have that scarred Cardassian guy that starts killing Kira's former resistance buddies and then captures her. And Kira is absolutely unapologetic "it was war you dumb fuck and you were the enemy, so i killed your boss, his family, melted away half your face, and enjoyed every bit of it".
We will never get a Trek-series again in which the good guy/girl is just "fuck you, I'll do it again" and the evil guy/girl might have a point.