Elaine Belloc (Lucifer + Michael powers), Lucifer with Demiurge power, Great Evil Beast (Before merging with the Presence), Composite 5D Imps, Father Time, Mother Night and The Endless

Composite Marvel Team ( Beyonder, Thanos, Molecule Man, Beyonder Race, Featherine, Dr Doom, Protege (With the power of his team can't copy the other team) and Ultimate Ultimates )

When you put this many nigh-omnipotent powerhouses against each other it becomes really difficult to discern a winner.

So Batman solos

No idea

Goku solos

Sentry and IW Thor solo.

WF Myx gets written into reality where he bullies the writers into combining all the listed combatants of Marvel and DC into two, individual personifications of their brand. They then engage in intercourse.

The end.

How many of the dc team are omniversal, or at bare minimum capable of destroying multiple infinite multiverses?

Thanos has a fraction of limitless power(toaa), which still amounts to limitless power, plus his ig that effected the beyonders realm accidentally, that’s a infinite dimensional or beyond dimensional realm outside of the multiverse...

Beyonder is in a similar tier, he had enough control over the multiverse that all of it changes to his slightest whim, so casually in fact he was questioning if it really existed, or if it was just his imagination.

Molecule Man put a omniverse in a box... literally...

The Ultimates and the endless are most likely non factors here. There are also too many combatants here for this to reach any legitimate conclusion unfortunately.