I think Deism is also quite reasonable. That is, if you do think of it in the laissez-faire sense, in the fact that if there is a God or "Supreme Being," they don't require anything from us.
A definition someone surmised recently of a Deistic concept of God:
"An eternal, transcendent force with divine intelligence, as the first cause; the architect behind the universe and natural laws."
And personally, I would say that's it. Nothing else further required. No need for God to send someone here for our "salvation." No need for prayers, religion, worship, or the belief in a God that controls the universe in any way, so no need to believe that any such higher power would want anything from us that would merit treating others unethically, or technically in any such way.
I think, even if this can't be proven or unproven, it is a somewhat reasonable approach to the God hypothesis, and it is the only "God belief," that I find somewhat believable, or at least somewhat reasonable.