Since they are all still alive at the end of the play and given the setting of the play, there are no literal/physical corpses actually in the play. However, Nora's father's death plays a major role, setting up the situation. Dr. Ranke is dying, and so could be considered a living corpse. Christine is a widow, and so again, the death of a man established her situation. Nora thinks of her own dead body when she considers suicide. As for Torvald, the main corpses would have to be metaphors: his dead reputation and his dead relationship with Nora.