There are alot of things in PF that are stupidly OP, like being a Wizard. You’re fine. I just feel like Necromancers are an odd fit outside of evil parties, but I can be flexible around this.
Seeing as we're building a kingdom, I'm actually considering running a Forgepriest, or perhaps some other sort of crafter, like a craft-focused Alchemist. I may need help on going through crafting rules, however...