Well, we need to distinguish 'creation' in two senses:
First creation (emanation, bringing about of being, creation ex nihilo): This refers to the initial giving of being (either temporally or in terms of its "procession"/"emanation"/"giving" from its ultimate source). Plato and classical platonism identify this activity with the form of the Good/the One.
Second creation (formation, crafting, shaping, designing the world): This refers to the arrangement of disorganized being already present into an intelligible, orderly, lawful world. Plato and platonism often identifies this activity with the demiurge and/or the henads. You can assign angels to this role (as Tolkien explicitly does is his cosmology). It is the usual idea people have of God's (or gods') creating the world and is most of the account of creation to be found in Genesis.
Provided that distinction is sufficiently clear the problem doesn't seem solved. Did the One have to emanate this demiurge or could he have emanated another? In your language *this* creator and not another would have to be necessary and I'm not sure that saves real possible worlds- certainly not without introducing a notion of libertarian freedom somewhere.
Fighting to the death "the noonday demon" of Acedia.
My BooksIt is precisely “values” that are the powerless and threadbare mask of the objectification of beings, an objectification that has become flat and devoid of background. No one dies for mere values.~Martin Heidegger