Okay, it's The Innocent Guy. I remember reading him in The Killing Joke and thinking, "Jesus, this guy's scary." I even watched a couple people on YouTube perform his monologue. But it was just hard to describe him now because that's kind of the whole point of him.
But anyway, thanks for the help, guys. In telling me to be more specific, I had to keep thinking up new ways to describe him and eventually landed on the right ones.