Numbers 12:3 informs us that “the man Moses was very humble, more than any person on the face of the earth.”
This article cites Rambam's (Maimonides) view that humility is an exception to Rambam's general agreement with the "Golden Mean" rule, namely that every person should always be exceedingly humble and one should possess no trace of pride or arrogance whatsoever.
My rav explained that in Moshe's case, his humility may have backfired. His reasoning:
It began when Eldad and Meidad prophesied in the camp. Yehoshua suggests to Moshe that these men be imprisoned, to which Moshe, in a display of humility says, "If only ALL of the nation were prophets."
His brother and sister speak lashon hara about Moshe, and Moshe does not respond. Perhaps, knowing that Moshe would not respond, because he was so humble, was an incentive for them to do this. Seeing a lack of response, perhaps, led to:
Korach and his men causing the uprising. Had Moses not been so humble and demonstrated a command of his leadership with Eldad and Meidad, instead, there's a chance that Korach's rising may not have occurred.
Did Ramba"m take note of any of the above situations regarding Moshe and either based on this analysis, or for any other reason state, somewhere else, that a leader of a nation or important group should on occasion NOT demonstrate humility?
Note: A possible answer could include any other source that analyzed the above situations with Moshe and disagreed with Rambam's principle.
Note: Answers should relate specifically to analyzing Moshe's behavior and not regarding a general rule of how others should behave in similar situations.