You cannot come up with a pantheon separate from a cosmology.

How was the Universe created. Are the goods creators or creatures (i.e., did they create the universe or did it create them?)

Where and under what conditions do they have power?

After those basic questions are answered, it will be easier to produce a set of powerful beings that fit within it.

I once created a universe whose origin is that it was created by a being to play games in for others of its ilk, which after all, was the simple truth. The conclusion I drew was that any god should be an outgrowth of my personality and mind.