CS (and maybe others), I don’t know why I didn’t think of this before, but what kind of a proof is it that your rebbe was so great because of so many gedolei Yisrael who said so?
There are many gedolei Yisrael who can claim exactly the same thing. In fact, they can claim far greater numbers because they will include Litvishe gedolim.
Their are two differences that falsely make your claim look better than theirs.
1. For the last decades of his life your rebbe didn’t visit anyone else. People had to come to him. (That’s why Lubavich “hated” PM Shamir, as he alone refused to come to 770 and be part of a lubavich PR photo-op.) Other rebbes and gedolim were visited and went visiting. So they didn’t appear to be so special with everyone davke visiting them.
2. Other rebbes and gedolim didn’t have teams of PR people whose job (either self-commissioned or commissioned by the rebbe’s attendants) was to show the world how everybody meets, greets and praises the lubavicher rebbe. I personally know of quite a few Israeli Rebbes who spend a lot of their valuable time being mechabed other gedolei Yisrael on the latters’ territory for the sake of Shalom and achdus. They don’t just wait for others to come to them and thereby seem to be more special.
As to something else you wrote about the shlichim caring etc, don’t forget, it’s also what makes them prestigious in the lubavich world AND it brings in parnassa. Please note that I wrote something along the lines of knowing many who seem to care sincerely. I stand by that. However, I personally know others who have opened chabad houses in areas that encroach on other chabad houses and who have caused machlokes within chabad. This isn’t lesheim Shamayim, and this does not show that they care about others, even though they may be really nice to their visitors because they have to keep up the numbers. (Opening chabad houses in frum areas and causing problems has already been mentioned by others.)