I might do the "Ess 3 upgrade, people with intimacies towards the corpse are compelled to make the corpse act appropriately, carry it along, etc, and the illusion covers this so onlookers think the person is alive".
I'm very much shying away from "reanimate a dead guy as a zombie, use this charm, noone ever knows he's dead", though; this is primarily spiritually intended as a tool to create shocking murders where someone is realized to be dead long after they actually are slain, rather than a social tool to puppet a society through a corpse ruler; that should be its' own Socialize charm, to me, given my feelings on Abyssal themes and tendencies.
Basically, Larceny here is fitting for disguising your murder, which is what you do as an Abyssal. Putting a dead puppet in a position of social power is Bureaucracy or Socialize.
[Edit] BONUS ROUND!
Deathgrip on Authority
Cost: 8m1wp, Mins: Bureaucracy 4, Essence 2
Keywords: Combo-OK, Illusion
Prerequisites: Any Bureaucracy Excellency
The hierarchies of humanity were intended to carry on in the face of death, but in the perfect design, death was an unmistakable thing; in a broken world where those who die linger on, who can say that their authority should be diminished? This charm is a dramatic action targetting either the ghost or reanimated corpse of a figure who, in life, held some position of authority, such as a prince, a wealthy Guild Factor, or the like. The Abyssal chooses an organization the target was associated with; the ghost or zombie [as guided by its' reanimator] gains any authority they held that was lost with death, imposing an Illusion on all members of the associated organization to this effect; the ghost in question, or necromancer in control of the corpse, may execute Leadership Actions as if they had legitimate authority. Other leaders of the organization may attempt to oppose this with a Shift Policy/Structure action, but suffer an external penalty on this roll equal to the Abyssal's Essence, and must succeed on this action [Abyssal's Bureaucracy] times. Upon successfully re-revoking the authority of a dead leader, their authority is lost and may not be restored by this charm.
If this charm is used on both the ghost and the corpse of the dead figure, both suffer a -2 internal penalty due to conflicting reports of the dead one's identity until either: the zombie, controlling necromancer, or ghost are slain; the two work together and seek to pursue the same goals; or one of the two is ousted by the above method (remembering that each may attempt this on the other, as well).
On Infernal logic:
(4:22:38 PM) Nekomimi Maiden: So I did the only logical thing.
(4:22:49 PM) Nekomimi Maiden: I fell in love with the bad guy and twisted his spine into a pretzel