Yeah pretty sure all evil deeds start with good intentions. So, no. I would very likely mess up my own head by thinking I’m doing the right thing, and if I’m secure in my position as the leader, I’d have a big load of yes men hovering around enforcing and enabling my every thought and idea, be it good or not. Most likely it’ll tend towards the “not good” side over time, and at some point everything just gets distorted and convoluted and by that point, there’ll be no return. And if I’m not secure in my position, then I’ll be dead and replaced before I can spell out my first decree as the ruler. If I’m to be good, I’ll not be ready for the bad coming my way. If I’m ready for the bad shit, I have to be ready to dispense my own bad shit. And that, then, wraps into my first point.

There’s no way that would work if I was truly benevolent. I don’t believe it’s sustainable or even possible to lead as a dictator that is good or benevolent.

Edit: that’s in practical terms. Let’s not even begin with the ideals — can one really ever be both benevolent or just generally good, and a dictator? I believe not. Sharing the burden and the authority would almost always be the more moral choice, not to mention more plausible in terms of lasting.