Current Molecule Man holds the previous Marvel Omniverse in a box for kicks, PR Beyonder is the literal embodiment of a realm that makes the transinfinite (defined as "beyond infinite"
Marvel Multiverse seem like, "a drop in the sea," and was capable of effortlessly annihilating the Marvel totality if he so chose. His feats throughout Secret Wars 2 were all done with him holding himself back, and the Multiversal Pre-Retcon Molecule Man said that comparing Captain America to himself is like comparing himself to the PR Beyonder.
WF Mxy was capable of destroying, well, everything in DC Comics, from the mainstream DC Multiverse to the 4th World, (wherein the mainstream DC Multiverse appears as mere bubbles,) and the 5th dimension, which is metatextual and pure imagination, and makes the 4th World and the mainstream DC Multiverse look microscopic by comparison. Mxy destroyed all this with the snap of his fingers, and recreated it all with a snap too. And Cosmic Armor Superman was basically a living retcon machine, able to adapt to literally anything, even the Multiversal Mandrakk stood no chance against CAS.