Hello, it might be an old thread, but I have found a simple way to do this:
This is the default “Movement Input” group of the ThirdPersonCharacter event graph. The only changes are on the “Get Control Rotation”, replaced by “Get Camera Rotation”, linked in the input to the “Get Player Camera Manager”.
Don’t forget to change the default player index with something like “Get My Player Index”, in case you want to do some multiplayer games.
I feel like it’s an elegant solution. (don’t know if it’s actually that elegant, I’m only a few days old in Unreal Engine)