Anyone know of one?
Evangelist (from Inner Sea Gods) and Hellknight Signifer (from Paths of Prestige) are two that come to mind. The former has a one level delay on all abilities of the primary class, while the latter fully advances domain powers already gained but does not enable you to gain new ones.
Divine Scion is the prestige class focused on domains and favored weapons.
Exalted doesn't advance domain powers, but does grant a 3rd domain.
Umbral Court Agent gives/advances the Darkness domain.
Do you want the domain powers and spells, or can you deal with just the spells? Any class that adds casters levels will grant you domain spells once you gain the ability to cast that level of spell.
I only want the domain powers scaling honestly I mean Spells are good, but domain powers will get me my goal