Lots of options have already been shown here. Supes describing how he can tear a apart a world and it's eco system. Supes talking about how he can crack a moon in half with a blow, Ego would certainly feel that. There's lots of options. The idea that you're ignoring/dismissing or claiming PIS all over the thread, doesn't change any of that.
You're clinging to a showing of Galactus needing help from Thor, and claiming Ego's losses are the PIS ones. That doesn't go a very long way towards proving he's a definitive winner here. It just shows that you're stubbornly clinging to a showing where he's portrayed as more than he is. Likewise, I could easily be doing the same with Superman beating Imperiex, Dominus, Blaze and tons of others. And in each of these, unlike Ego, he actually has definintive credible wins. Maybe I'll go around throwing up hyperbole and a random good showing from Supes and claiming he can beat Galactus too?
You're right, it's not a regular planet. But he stopped the fire of a thousand suns with regular cold - an impossible task. Clearly hyperbole, but we can except as much from a comic where Galactus needs anything at all from Thor. Comparing regular cold stopping the heat of a thousand suns to a guy who we know absorbs star energy as a power source doing that very thing is vastly different circumstance.
On one hand we have.
Cold stopping him from taking damage after being fully engulfed the fire of a thousand suns.
A solar funnel/battery -- storing/funneling solar energy.
See the difference?
Superman's record against beings similar to Ego, or even more powerful, is not only more plentiful, but he also has definitive wins over them and at a higher percentage than Ego has in his known comic history over beings of any calibre.
Galactus running away from Ego to get help from Thor is the PIS if anything in the thread is, I don't see what you don't get about that. Regardless of the part he played, Galactus shouldn't have needed him at all, and it takes away from the credibility of Galactus' power level, and the the story overall.
You feel Ego can win, I can respect that -- but you said it's a stomp. I'm just trying to show you it isn't. It's certainly up for grabs. Superman has consistantly defeated threats like Ego, while Ego can has had problems with guys like Superman. It's not hard to put two ideas together and understand that Superman certainly can defeat Ego.