Rhetoric isn't grammar. And the use of pluralis maiestatis isn't rhetoric. You seem to miss the somewhat obvious fact that the author saw God as Majesty, therefore used the plural. But whether this be rhetoric or simple grammar, neither allows the conclusion that God was plural. And seeing as the first biblical writings predate Aristotle, I'm not sure what you think he has to do with the project. Certainly the writers wouldn't be, as they show precious little interest in intellectual matters beyond the purely spiritual and political. In fact, the only aspect of philosophy that the biblical authors seem interested in at all is morality.
God was a gardener, wasn't he? I'm not sure what that has to do with seeing God as Father - which is also done in the Bible itself. But that apart, the biblical God also shows little interest in intellectual matters. He seems more fascinated by His own emotions, with complete disregard of anything else - including the humans He created. whatever can be distilled from the Bible, it doesn't amount to any scientific or philosophical system. It's: Obey God, or face His wrath. And offer Him strange gifts, such as male foreskins. Do this and you shall be rewarded. Or tortured for His pleasure, like Job.