God Exists, Relatively Speaking Hi Agent Smith,
I think your argument can be laid out like so.
1. If the most powerful person, the most knowledgeable person, the most moral person exist, and they can form a triumvirate, then a relative God exists.
2. The most powerful person, the most knowledgeable person, and the most moral person exist, and they can form a triumvirate.
3. Therefore, a relative God exists. (MP 1,2)
While this is a valid argument, I do not think it is sound. Premise 1 especially seems objectionable. God's intentions and actions are good, and therefore a relative God's intentions and actions must also aim at goodness. Just because a triumvirate includes the most moral person in the world does not mean the actions and intentions of the triumvirate will be moral. The difference is that God's qualities- omnibenevolence, omniscience, omnipotence- are cohesive. What I mean is that they are always in agreement with one another, and therefore the intentions and actions of God are always good. The specific two qualities that must agree are morality and power. If they disagree, then the triumvirate will still act evilly. Take the following example. Say, Albert Einstein, Mother Teressa, and Hitler all existed simultaneously. Let's say they were respectively the most knowledgeable, moral, and powerful people in the world. If the three created a triumvirate, they would be considered the relative God. However, Mother Teressa and Hitler are likely not in agreement on actions to take. Because Hitler is the most powerful person in the world, he has the power to override Mother Teressa's desires. As a result, Hitler will act in an immoral way. These actions go wildly against the nature of God, making the triumvirate far from a relative God.
I think an adjustment could be made to the argument, specifically to premise one. You could either change it to:
1. If the most powerful moral person, the most knowledgeable person, the most moral person exist, and they can form a triumvirate, then a relative God exists.
Or,
2. If the most powerful person, the most knowledgeable person, the most moral person exist, and the moral and powerful person agree and they can form a triumvirate, then a relative God exists.
These adjustments to your argument ensure that the powerful person will aim to act morally, meaning the triumvirate can aim at good just as God does.