In Amber, there is an understanding that there is a Prime Reality (Amber) and that other worlds are shades cast from this reality. This Amber, a place of order, and the Place of Chaos are two ends of a line segment with these shadow worlds between them. My interest in this thread deals mainly though with the characters walking within these shadow worlds. In Amber, the Prime residents can walk these shadow worlds, but in doing so they can leave traces of their shadow selves there. This is a bit different than say Mirror Mirror alternates, as in Amber there is a Prime Individual that has an ability that the other shadowselves don't. They can walk the Pattern and survive it while their shadowselves can't.
So, for Dresden Files I'm asking are there shadowselves of say Harry that is distinct from alternate Harry's. Are there Mirror Mirrors in the Dresdenverse that are closer to Prime Reality than the Others. Could Malcolm Dresden be a shadowself of some other being that has a Prime existence and is still living. Or in a generic question, are there other beings that exist in which case we see a shadowself, but not the Prime self. And again, this would be separate from alternate realities in which supposedly the entities would be equal as far as 'Primeness" goes.
In Ghost Story, we do see a hint that there exists a more Prime Reality with Uriel's office existing on a different plane that mortal Earth. And, we see in Summer Knight that Mab and Titania can pull out a different 'reality' in OverChicago so that they can war against each other and settle differences there.