No you do not. The Emperor's real body is a Sith Pureblood. In the JK story line he is a human. He's still alive, just probably really weak. Also when Kira talks about how her friend can hear the Emperor still, it's just his weakened and fractured mind reaching out to the galaxy. His presence must be so weak that the Dread Masters don't even feel him in the force. Also, if that was his original body, why would he bring it into known space? If he is as clever as he is, he would use his voice to do the ritual so that if he fails, he will have a body to fall back to. Also, his Hand stated that in fact he is still alive only weakened and in Unknown Space. Look on all possiblities before using radical theories please.
the emperor as ascended and can inhabit a lot of different body's he does this a lot in the comics and in game i'm not really sure if his original body is still around but it would be grate to see him how he is described in the Book Revan in game