From the point of view of “can you hold power and not let your heart of hearts be corrupted?” - Yeah, sure, why not? The problem is that as soon as you have a significant amount of power, someone else is going to want it. Probably someone with fewer scrupals. So you will quickly be forced into utilitarian thinking - you must do whatever is necessary to maintain your position of power, lest you be usurped by someone worse. And what is necessary to maintain power, to a common person, is often corruption, violence, and austerity for the people.
Relevant CGP Grey.
From the point of view of “can you hold power and not let your heart of hearts be corrupted?” - Yeah, sure, why not? The problem is that as soon as you have a significant amount of power, someone else is going to want it. Probably someone with fewer scrupals. So you will quickly be forced into utilitarian thinking - you must do whatever is necessary to maintain your position of power, lest you be usurped by someone worse. And what is necessary to maintain power, to a common person, is often corruption, violence, and austerity for the people.