The comforter that Jesus is speaking of is the Holy Spirit.
peace
But in Jesus' own words he says if i go not away HE can not come, meaning the comforter. Again, even if we say ok it is talking about a spirit. Jesus is also called the comforter as he is supposed to have the spirit of god in him being they believe he is god in person. So why the need for another comforter if jesus was already here in the flesh? The embodiment of god's spirit?
So if jesus was the comforter and he said he had to go so another comforter could come and be with you forever, then why the need for christ's return if we've already had 2 or 3 comforters? I mean how much more comfort can the people stand....?
Just joking, but do you see my point?