Out of curiosity, who had unchecked power and was not corrupted by that?

The problem is, more of us are corruptible than we think.

Well, per Herbert's quote, I think the attractiveness of power is directly and inversely proportional to how corrupt(ible) a person is. The best leaders are the servant ones, who see leadership as a burden to bear, and to assume only begrudgingly as need thrusts it upon them. Those who look to it for the ability to change the world, even with the best intentions, are imminently corruptible; they're already approaching it with the idea that they know best, and others who disagree are wrong and need to be kept subservient.

That's why we need more women in power.

I agree that we need more women in power; I don't really agree that that's the reason why. If women are generally more disinclined to pursue power I suspect it's cultural, and liable to change.

The only resistance to power corrupting is the belief that you don’t deserve the power (humility).

Or just no one in power, like a horizontal governed political system.