Greg responds...

Green Lantern's not particularly strong. Not physically. As for Captain Marvel, it depends whether we're talking season one or season two.

I'm not too interested in ranking generally, so I won't be held to this, but I guess I'd rank it Superman, Icon, Captain Atom. The latter's strength is augmented by energy from the quantum field reinforced by his alien metal exo-shell. The energy is virtually unlimited, but there's only so much augmentation his muscles - even with his exo-shell - can manage.

But they're all very strong. And often, strength is situational. No one's interested in how much they can bench press in a gym under controlled conditions. (Or at any rate, I'M not interested in that.) So in one situation, I could see Superman being stronger; in another, Icon, etc.