Who is the mediator of the New Covenant? Christ Jesus? Or "The Christ"?
Paul is pretty clear when he says it is "the man Christ Jesus":
For there is one God and one mediator between God and men, the man Christ Jesus (1 Tim 2:5)
However... since the WT$ claims to also be "The Christ" along with Jesus, they include themselves in this "one mediator":
[The New Covenant] will be exactly like the old Law Covenant, except that it will have a better Mediator--The Christ, Head and Body. --WT Oct 1/1915 p.294 (R5776)
"The Christ": "Head" = Jesus; "Body" = "anointed" jws