The bloody shoreline/Pantheon
The gods of the realm are not petty and jealous. Clerics of the realm aren't forced by the gods to be 'exclusive' and will frequently simply serve the pantheon. There are still some clerics dedicated wholly to a specific god, though they may channel a spell from another god when relevant, or issue a prayer to another god without it being weird. Generally a clerics domains represent the gods that they're closest to, but they can also represent that cleric as a person, too.
While there are distinctly evil gods, it's not that prayers shouldn't be made to them. Vecna, for example, is distinctly and wholly evil, but is still the patron of knowledge and magic and is respected as such (despite the fact that he'd turn to world into zombies if he could)
The pantheon in this world is somewhat fluid. It's not supposed to be possible, but gods can die. Several mortals have also ascended to the power of godhood.
This pantheon isn't complete, so feel free to add to it (via FB message, probably).