To me it seems that you have a very unsophisticated, even childish, understanding of the human mind and how kavod works. It doesn’t have to be kavod that someone else gives you, although there is certainly some of that in nearly all cases of chabad shlichim, but the kavod that you feel becaue you are doing what to you seems a bekavodige thing. If a shliach feels that he is a big chassid becasue he is on shlichus, then the bizyonos he gets doesn’t faze him. Aderaba, it makes him feel even better with himself.
Nothing wrong with any of that, but it just can’t be called lesheim Shamayim or ahavas Yisrael.
So pretty much no one is Lesheim Shamayim. Literally. Name me any one except for Moshe Rabbeinu (and I exempt him only because Hashem testifies directly about him that he was the most humble person), and I’ll find his Shelo Lishma. Whether it’s for the good feeling, or Gan Eiden, or for the physical fame.