The Trafficante crime family. Let me elaborate:

By 2007, LoScalzo was legit/retired. He was still running schemes (or at least one scheme) until (allegedly) 2000, and was investigated for loansharking in the early 2000s although no charges for those were laid. Which means that in 2006, 2007 and even today he is the "boss" of the Trafficante crime family but, as that article I linked to you mentioned, there was nothing to be the boss of by 07. I doubt there was any definitive moment where he stopped being the boss. It's not like he was demoted or anything, but it's like a Billy D'Elia situation.