This seems to fit well in the Domain category, so I won't create a new one for it.
Just a basic idea here for the class. Over time, some of the Devotees have morphed into more specific prestige classes, and hence none of them now exist.
There was once a Devotee of Healing, but that is now the Master Healer class and hence there are no more Devotees of healing.
The Devotee of Travel became the Pathfinder.
The Devotee of Liberation became the Liberator.
Any other classes that come to mind?
The prerequisite for the class must allow for multiple deities.