New York has long had a bumper crop of notorious landlords. But it’s hard to peg Frank Palazzolo, a wealthy Westchester real estate operator, as a member of the worst-landlord club. That’s because, even though the scores of buildings he was associated with teemed with violations and creaked in disrepair (in 2002 one of them was the scene of a fatal electrical fire), actual legal ownership of most of the properties was usually in the hands of others.