If we assume that the country isn't going to become authoritarian and will have some form of democratic elections, if you get rid of the president's post, you n

If we assume that the country isn't going to become authoritarian and will have some form of democratic elections, if you get rid of the president's post, you need an equivalent person and the shift in responsibilities. If the system changed to not elect the leader directly, but indirectly like in Germany, it wouldn't just change the possibility of someone corrupt getting into power, just the way they get into power. With that in mind, what would you replace it with?