While we’re talking about different Gedolim, I want to add, that one of the major Poskei Doreinu, the Shevet HaLevi, Harav Hagaon Rav Vosner z”l, was an admirer of the Rebbe and Chassidus Chabad in general, he had a relationship with the Frierdiker Rebbe going back to the 1930’s, and had a Yechidus with the Frierdiker Rebbe several times.
In Sivan of 1976 Harav Vosner had a lengthy (three quarters of an hour) Yechidus with the Rebbe, and the Rebbe personally escorted him out.
During the Shloshim for the Kedoshim of Mumbai, (who’s Yartzait is this week) in a telephone address, Rav Vosner said the following:
“Regarding the shluchei Chabad it is fitting to apply the saying of our Sages in the Midrash Raba: ‘There is none more beloved to Hashem than a shliach who is sent to do a mitzva and is moser nefesh to be successful in his shlichus.’ How fitting these words are to the Chabad shluchim, who are undoubtedly beloved to Hashem for being moser nefesh to spread Judaism and to make the name of heaven beloved all over the world.”
At the Siyum HoRambam in Yerushalayim in 5772, Rav Vosner spoke, and among his remarks said the following:
“This great thing that the Rebbe did, that we unite in the study of Rambam, and by doing so we hasten the coming of Moshiach. The Rambam begins with the laws of faith in the Hilchos Yesodei HaTorah and ends with faith with the Hilchos Melachim. That is the uniqueness of the Rambam’s work that it begins and ends with emuna and it includes all the mitzvos that pertain nowadays and that do not pertain nowadays.”
The Shevet HaLevi would send his seforim to the Rebbe, and the Rebbe would send back comments on his Tshuvos.
After meeting with the Rebbe, Rav Vosner remarked that he was prepared for the Rebbes memory, as it was well known, but he remarked, “ober aza amkus”.
Rav Vosners reputation as a Posek and Tzadik speaks for itself, and his relationship with Chabad speaks for itself.