Yes, Vito Genovese is probably on the list too. He did kill a man to get the woman who would become his wife.

I say probably because when his wife double crossed him when he went to jail, he did not have her killed. A true psychopath would have killed her.

The Genovese idiots from Springfield that killed Bruno may qualify. IMO, the Genovese's have had more strategists and tacticians than all the other families combined. They have had some wily and cunning SOB's.