In a manner of speaking, all God has done, that is, all of creation, is done for his elect. Not at all to deny that he is doing it for himself, for his own glory, but that all creation is for the purpose of bringing about a people to be forever with him. Not even the angels have that status with him—they too were created as part of what it takes to make his particular creation.
So, whatever we may otherwise be likely to describe as, "whatever else besides what it takes to produce that people", is not really "else". It takes everything, for that people to come to be.
Notice that I said, "In a manner of speaking". I don't mean that God does not have other things in mind with which to glorify himself—let's say, for example, his holy angels. Yet, you'd be hard pressed to show that his holy angels will have no effect upon how the Bride turns out to be.