Chossid: “So let’s get this straight, the Rebbe didn’t make up the CONCEPT of nossi hador, (because the mekoirios do speak about the CONCEPT), rather applied the NAME nossi hador which is brought in Torah (just not recently). And the name is which you don’t like. Ok I have no problem with that.”
We still don’t quite see eye to eye on that. The title Nossi Hador implies more than tzadik hador or gadol hador. It is something akin to what Moshe Rabbeinu was, and applying that title to someone nowadays while meaning the same as tzadik hador is “cheating”.