User blog comment:Mattia Garavini/Pure Evil proposal: Deacon Blackfire/@comment-43752982-20200125170359

Yes. This guy stands out even among Batman's other foes with his actions. Killing countless people,  forcing Batman to break his code, and targeting those weaker than him make him one of the worst of the DC universe. Also, he lacks resources compared to several of Batman's other foes.

Honestly, unless we factor in one of the more ruthless versions of Batman, anyone who makes him even consider breaking his code could count depending on their actions. This monster, however, brainwashed him into killing others which is even worse.

Strong yes.