They're also meant to have wings, which you hear the beating of when you approach your death.

Regardless of whether it looks or sounds like any particular historic imagining of valkyries, because it is literally transporting you from your death in Midgard, to Valheim as opposed to the traditional Valhalla I assume that is their (the devs) interpretation of a valkyrie.

I could be wrong.

But it is nothing like a Raven. Some sort of Hawk or Eagle maybe.