You can hardly have picked a worse example than George Washington who walked away from power, perhaps absolute power, twice. Once at the conclusion of the war and once after his second term as president.
Winston Churchill is reputed to have said, "we are all worms but I do believe that I am I glowworm" however he is also a very bad example because he strove for power to advance ideas. Unlike Trump, no one was more gracious to his political enemies than Winston Churchill. Yes, Churchill had a profound belief in his own destiny but he never wavered from the view that he was operating within the rule of law according to the will of the people.
Patton was an egoist which might have been wonderful in a general assigned the task of fighting by maneuver but terribly dangerous in a politician. I cite Napoleon to you.
My view of Trump is that he is certainly a narcissist, that he seeks power to advance his ego and not for the benefit of humanity, although he certainly confuses the two. There is a difference between someone who pursues power for its own sake or to feed his ego, such as Napoleon, and those who seek political power on behalf of decent ideals. The test, is the individual committed to some values outside of himself? The biography of Donald Trump suggests an obvious conclusion.
Again I must respectfully disagree with the narcissist label (which is where this argument seems to be headed). The question is not does Trump have an ego, of course he does, but rather are his goals ultimately self serving. I believe not based on admittedly anecdotal evidence. Trump has performed some services, such as flying a sick child from LA to NYC for medical help, paying off the mortgage of a good Samaritan that stopped to help in one night, or rescuing a NYC ice skating rink are not the actions of a narcissist.
A narcissist would not care about a sick child, nor give reward to someone who helped him (he should have helped me because after all I'm me), or taken on a civic project that mattered only to the great unwashed and not his bottom line.
So if he doesn't lust for more money, and he is not narcissistic, then what is his motivation?
"By his fruits ye shall judge him". I have always equated "fruits" with "children". Look at his kids. Even Reagan's son stood against his old man. I see no signs of that with Trump.
It may just be possible that his motivation is truly altruistic. But tough times require tough actions, even if the motivating factor is altruism. Look at Patton to see what I see in Trump. He was a hard ass bastard, but the world ended up better for his role in it.