Hey now, those are fighting words! I'm Gen X, muthaf---er!
.....or Gen Xenial, depending on which years you use to define this stuff.
Oh I'm not trying to tell you you're wrong. You like those stories, cool, they're very popular so you're not alone. My point is that, especially with Supes, there's a lot of flavors out there. Who am I to tell you you're wrong?
But if you really wanna know...I don't really have a "Top 10" list but right now, my top 2 are probably All-Star and Smashes the Klan. Both capture the nuance and complexity of the character, All-Star makes great use of the weirder aspects of the mythos and injects tons of pathos and Smash has one of the best takes on the alienation of Superman I've ever seen. But neither story is perfect; All-Star is too much of a pacifist and Smash has a limited scope and neither really delve into the divide between Clark Kent and Superman.
My issues with Kingdom Come and Action 775 (What's So Funny...) are these; in KC roughly half of Clark's actions are out of character. That's to be expected, this is a story about what happens when heroes fail, and it's a fantastic story, but because of the premise it's not a good measurement for Clark's (or anyone's) characterizations. Waid gets Superman but to make the story work he had to break the character. For example, Clark wouldn't retire just because the public disagrees with him about lethal force, he isn't Superman because it makes him popular. Action 775 is framed as a political debate and, at every single turn, Clark loses the argument. He provides an opinion in each scene, Manchester Black counters with valid arguments and Clark, not once, has a good rebuttal. Then at the end he beats everyone up and preens as if he won the debate. Clark's argument ultimately boils down to "getting murdered is scary!" while Black can cite multiple, logical (cold blooded, but logical) reasons why lethal force saves lives in the long run. But Clark beats him up in the end and calls himself the winner. Imagine if Biden and trump got on the debate stage, and after two hours of losing arguments trump walked over and punched Biden in the nose. That's basically the plot of Action 775.