Re: One Sun, Many Sungods?
In my fantasy world the gods are (or have) really good PR guys. They do much of what they say, but the stories are exaggerated.
Using your example of the sun, I have the sun exactly like it is in the real world, but each sun god governs aspects of the sun as it pertains to life in their geographical region. The things they do that are attributed to being the sun are actually things they do to bring the sun's effects to that area. For example, if the sun is supposedly the Sun Father riding his chariot across the sky, then the Sun Father really does ride his chariot across the sky, making sure the sunlight reaches where it's supposed to, checking on the ozone layer, and so forth; it's just the stories he tells his priests about the chariot actually giving off the light. And sometimes it really does give off a bit of extra light, if that's called for.
Sometimes gods with overlapping responsibilities cooperate, and sometimes they compete and fight, depending on their respective needs and desires.