The phrase "an example of leaders" is correct and usable in written English.
It can be used when referring to specific instances or cases that illustrate the qualities or actions of leaders.
Example: "Nelson Mandela and Martin Luther King Jr. are often cited as an example of leaders who fought for justice and equality."
Alternatives: "a model of leadership" or "a case of leadership".
Battery Park City serves as an example of city leaders beholden to developers, who encourage the concept of Manhattan as an increasingly exclusive enclave for the wealthy.
The resolution of the Daniloff case, which had impeded negotiations for a summit meeting, was an example of how leaders can sweep aside unpleasantness.
For others, this was an example of university leaders capitulating to the demands of petulant youths, the epitome of political correctness run amok.
Mr. Wagner's column in Emory Magazine cited the 1787 compromise, which counted slaves as three-fifths of a person for determining representation in Congress, as an example of how leaders reach successful agreements.
The principles of Ohana Benioff introduced at Salesforce are an example of how leaders can hold themselves accountable and rise to the level of genuine ethical leadership, as was the case for Benioff when he faced the pay equity challenge.
Mohammed told Bach to carry out a suicide bombing in the combat zone, say investigators, who describe it as an example of militant leaders' quick, efficient screening of recruits.
Churchill is an example of a leader who overcame deep unpopularity and had to fight for his political survival.
Chilton provides President-elect Donald Trump as an example of a leader lacking a maturity he'll need to unite people under him.
Franklin D. Roosevelt served four terms and one parliamentarian held him up as an example of a leader whose long rule brought stability.
I think Mugabe is an example of a leader who came in as a liberation fighter and — I'm just going to be very blunt — I do not see him serving his people well.
