The concept of God in different religions as well as deism seems to be inconsistent. So what is the best way of defining God?
A god is a person whose will cannot be disputed by humans
A god satisfies all three of these criteria:
A god is a person. Do note that person does not mean "human". All humans are persons but not all persons are humans. The concept of "person" was actually developed during theological debates during the 5th century common era to distinguish between a god and forces of nature.
A god has a will, a plan, and acts to enforce this will/plan.
The god's will cannot be disputed by humans. The god answers to no human and no human has the authority nor the weight to dispute the will. Humans may try to defy the will, but it will still not be disputed.
I would suggest a reading of defining God by what He is not.
The Tâo that can be trodden is not the enduring and unchanging Tâo. The name that can be named is not the enduring and unchanging name.
Compare with Douglas Adams:
There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable.
There is another theory which states that this has already happened.