Apocalypse stronger that Galactus if he gets imbued with Power Cosmic?
Galactus practically IS the Power Cosmic.
The heralds are his "loyal" servants, they can't match him, only Tyrant was in his equal before he become "less" powerful (ROTFL less powerful my socks, he beat the living crap outta Jack Of Hearts, Morg, Silver Surfer, Quasar, and forced Thanos to go all out, that guy is someone no hero should mess with.)
Apolypse feats are only make plans that get wasted from X-Men and other heroes.
Twelve ritual, ended with Apocalypse teleporting away with Living Monolith.
Apocalypse in cartoons trying to conquer time and space, ended with Apocalypse saved by one of his horsemen.
Apocalypse trapping Namor, with his "uber alles" brain and intelligence he should know what happens when you mix water with the Avenging Son.Result, Apoc run for his life like a scared kitty.
Apocalypse is pushover.
He make a Hulk which durability was fluctuating cause he was the link point of Heroes Reborn and normal Marvel Heroes universe, so his powers were sometimes outstanding like when he stomped a really depowered and mortal, but still strong Hercules, or patethic like when he stabbed himself on an old steel pole placed from DeadPool on his path.
Apocalypse is able to speak with great words and impressive lines, but in continuity, actually, he's somewhere praying his enemies don't find him.