Rereading Chistopher Moeller's JLA: A League of One and "JLA: Cold Steel" via the new JLA: A League of One: The Deluxe Edition

I used to think about the Justice League a lot in the late nineties and early '00s, and I remember at one point thinking that a good qualification for whether or not a hero belonged on the team at the time was if they would conceivably be able to defeat all of the other members of the line-up.That probably sounds like a pretty dumb criteria—like, if Martian Manhunter is able to defeat Superman, would Superman be able to defeat Martian Manhunter?—but I was just thinking conceivably, not that, say, J'onn could take Superman every single time if they fought repeatedly. Of the "Big Seven" in 1997's JLA #1, I think that criteria holds true, for the most part...I guess Aquaman is the only character I can't see reasonably beating any and all of his peers one-on-one, although he did drive away an early version of the League featuring Wonder Woman and J'onn in 1996's Aquaman #16.This many decades later, I'm afraid that I can't necessarily think of in-comics examples of stories in which a…