I know the Stranger has had some low end showings but whenever the Cosmics gathered we always saw him grouped with the likes of Galactus, Kronos, grandmaster and the Watcher. I think it's safe to assume these types were his peers...but maybe I'm wrong.
In the "What if" (I know I know) with Korvac he's tossing around Planets... I just dont see Zues being able to rub shoulders with the aforementioned entities..Odin Maybe...
Molecule Man- Isn't he at least as powerful as a sentient fully formed cosmic cube? On the high end wasn't he capable of tossing Celestials around? I would think he is easily on another level.
Generally though I'd put Stranger and MM above Odin and Zeus.