In some situations, sure. But generally speaking, Clark doesn't need anyone to cover for his weaknesses like that. Not only are both rare, but Clark works around them on his own all the time. What a good partner offers is a different perspective. Billy has the Wisdom of Solomon on his side, but Billy and Clark both see the world in much the same way, from similar perspectives. It's not that Clark is naïve, but he sees the world in a binary, he doesn't see all the moral shades. Bruce can. That's what makes them such good partners; they see things totally differently, and combined, not much slips by them.
I wasn't speaking literally.
No, neither of them are going to become tyrants. Though....I can see an older Bruce taking over the League of Assassins and bending them to his designs. But that's a tangent. But no, neither want a throne. But they are trying to build a future that's better by their subjective standards. And while Bruce isn't likely to ever really go all-in on the authoritarianism, there *are* shades to it in his ideal 'better world' that Clark wouldn't stand for. And there's security risks in Clark's ideal world that Bruce would find too foolhardy to allow. So I stand by what I said; not in a literal fashion, but the last thing standing in the way of Clark's brighter future is Bruce, and vice versa.
With Kingdom Come, the whole point everyone forgets is that each of the Trinity made a mistake they normally never would have. You can't get a dystopian future like KC with the heroes acting the way they 'should.' Bruce going too deep into authoritarianism was his 'sin' and I agree that too many people, including DC, forget that this wasn't meant to be a blueprint for the characters, it's a cautionary tale.