It would be hard to take Leadership 'models' from much of Peter Drucker's writing, however here is what he said on his 95th birthday interview with Forbes Magazine, please read the full article http://www.forbes.com/2004/11/19/cz_rk_1119drucker.html
What Needs to Be Done
Successful leaders do not start out asking, "What do I want to do?" They ask, "What needs to be done?" Then they ask, "Of those things that would make a difference, which are right for me?" They do not tackle things they are not good at. They make sure other necessities get done, but not by them.
Successful leaders make sure that they succeed! They are not afraid of strength in others. Andrew Carnegie wanted to put on his gravestone,
"Here lies a man who knew how to put into his service more able men than he was himself."
Ken Blanchard of :01 Management and Situational Leadership fame wrote in his Blog today http://ht.ly/2wOQE
Peter Drucker, one of the top leadership gurus, claimed that the best model for tomorrow's organization is that of a symphony orchestra. In such an organization, a single person—the conductor—coordinates the performance of hundreds of specialists. The conductor communicates directly with each musician and can tell the musician what is needed to achieve the right combination of sounds without knowing how to play the tuba or the drums.
Leaders are more likely to be effective at managing anyone if they have or develop the skills that are related to people and not specifically to a job or profession.