>>712586957
Sauron is very powerful. Not just physically, either. His corrupting influence is unparalleled. And he can very easily switch to brown-noser mode.

He'd get dropped immediately by any virtuous god, but any evil/dark/chaotic god is going to see him as a valuable servant and he'll stab them in the back. Sauron himself is the Middle Earth equivalent of a minor god, more akin to the Greek gods with the actual gods he served being akin to the titans.