Originally posted by Bentley
The Avengers didn't do anything to Korvac during that battle, it was just an extension of Galactus being toppled by the Thing.The closest incarnation to that one (What if Korvac) effortlessly resurrected every Avengers, bfrd SS, Dark Phoenix and Classic Strange and blocked the Gateways to other dimensions -and Odin couldn't do anything about it-.
Measuring every incarnation separately is hard because he has few showings, we know that a weaker version was above Karina -half elder- and fought off a Cosmic Cube. Everything points out to above Elder at least.
You'd best be careful by bringing in that What If. During it, Korvac wanted no part of Galactus and sent his Avengers slaves to fetch the UN to deal with him.
Getting back to canon appearances, Kruegarr imprisoned Korvac in a dimension where his powers didn't work and then transported him to Galactus. Galactus took the power back in one panel and that was that.