It looks like Antiquity Persia may already contain some Sassanid elements, but they're the best option for an Exploration Persian civ IMO--mostly Persia was ruled by foreigners throughout the period.
We already know Antiquity Persia will be chiefly Achaemenid, and Safavids fit better in Modern--plus, the Qajars were largely a failure as a dynasty. (I wouldn't consider the Seleucids, Seljuqs, or Ilkhanate as Persian, though obviously they'd be regional options for Persian civs. I'm fine with treating all the Hellenistic kingdoms as "Greece" TBH, though I think the Seleucids have a better argument to be treated as unique than the Ptolemies.)