CS: “What I meant by Eliyahu hanavi and har hacarmel was that rashi there says that someone who is known to you to be a tzadik (or whatever equivalent term is used), you follow him unless he tells you to serve another god or permanently cancels a mitzvah.”
As far as I remember it is not at all an equivalent term. It is a navi who is known to be a true navi. We don’t have one of those nowadays, regardless of the outlandish claims of the Lubavicher rebbe.