Hmm....The realization that
his family isn't going to get magically fixed might qualify. A vampiric transmogrification could go along the lines of "Well you just haven't been
trying! You don't even know
how to try! 'Support' guys somehow manage to pursue everyone's goals
except their own." And the end result could be a vampire who does what's best to promote harmony among the people around him. Whether they like it or not, and whether their idea of harmony agrees with his or not. And where dominating or vampirizing troublemakers into behaving is considered harmony-inducing. As is executing unreliable thralls.