Achilles
The original storytellers of The Judgment of Paris don't seem overly concerned with chronology, because the golden apple is thrown by Eris, the goddess of discord, into the wedding of Achilles' parents because she wasn't invited, which implies that Achilles wasn't born yet. But, he shows up shortly afterwards as a warrior at Troy.
Much has been written on whether Achilles' relationship with Patroclus was homosexual and, if it was, which man was older and dominant - Achilles or Patroclus - since the message of the Iliad changes accordingly. The dispute goes all the way back to classical Greece and a good case can be made either way.
The painting above on ceramic pottery dated to around 500 BC.