Figured I'd check the Living Greyhawk Gazeteer for you. The following are deities with a bow as "signature weapon" (i.e., spiritual weapon form). Remember no cleric gets proficiency for free unless the War domain is available.
Ehlonna: longbow; NG; Animal, Good, Plant, Sun.
Myhriss: shortbow; NG; Good, Healing, Protection.
Phaulkon: longbow; CG; Air, Animal, Chaos, Good, War.
So I suppose Phaulkon, with both Longbow signature weapon and the War domain, would be a nice choice.