But the ideal world scenerio doesn't actually work in an actual world; people will inevitably muck everything up.

Actually, the backstory says that when the Heterodyne boys were about, Klaus was right alongside them, working together to fight the good fight. He had a fling with Lucrenzia -- and severely disapproved of her actions.

When Klaus carpetbombs cities, he does so because there's something dangerous within -- most of the citizens being servants of the Other seems to qualify (and you'll note that Agatha and Gil have both said they'd rather die than be in that state, so it's not all that horrible).

He keeps DuPree in line as much as he can; and even at her worst, he knows she'd be even more dangerous if she was just off on her own.

He didn't kill Adam and Lilith; Von Pinn did. Lars just stood in the way while he was attempting to kill what he thought was the Other. He has no problem with Agatha -- it's Lucrenzia he wants to take out, because he knows just how dangerous she can be.

Well . . . if Klaus wasn't in his position, who do you think should be in charge? What system do you think could actually work here?