Understanding the Christian Trinity For example, someone above mentioned that Jesus supposedly said something about 'the Father' that made it sound as if 'the Father' might be a distinct person from himself. He said "forgive them father, for they know not what they do" or something. — Bartricks
If you talk to yourself, do you refer to yourself as "mom" or "uncle", for instance? I don't think that's a good argument against the trinity, but I think there are plenty of other options.
In terms of non-trinitarian suggestions in the Bible, there are of course the several words used for "God" in the old testament (I'm hazy on this and going to bed soon, apologize for the low post quality). "El" is one, which I think was the name of a Babylonian God. Some scholarship suggests that the ancient Hebrew religion grew from polytheistic to suddenly monotheistic. Of course this says nothing about a fervent believer's position.