A tyrant, in the purest defining sense, is synonymous with a dictator. It is a ruler that exerts rule through absolute legal authority, without any personal oversight other than the risk of popular revolt. (Famous ancient examination is the Sword of Damoclese, and the moral behind that story.) It tends to have popular overtones of ruthless exertion of that power to sustain its method of rule, but that overtone is not strictly required, this is true. This subjective alliteration is what separates the use of the word tyrant from dictator or monarch in popular use. Technically, all three of those are synonymous, but in popular use they have different meanings: A tyrant is more ruthless than the dictator, who is more officious than the monarch.
In this case, the word we need describes this exact thing:
A benevolent leader who leads for the benefit of his community, at the defacto exclusion of himself; A leader that increases his own position exclusively through the improvement of the common standard of living of all the people he leads. Further defined as an individual who does not believe in double standards, and so does not seek unbalanced relations with groups other than the one he leads.
This would exclude cases like Augustus Ceasar. While he began the pax romana, and all the public works that this afforded, he still did so through exploitation of outside demographics, and thus embraced double standards.
It is my contention that we need this highly specific word, as well as specific words for individuals like Augustus Ceasar, to contrast them with later emperors, like Caligula. To do that, we do indeed need specific defining characteristics. That does not obviate the need for specific words.
Words that do not exist, in this case.
(would you please drop the innane chatter)
I would LOVE to. However, there are individuals who just cant resist the urge to make a neg, and I dont concede to bullies.