Those are all of them. (The highknight is way overpowered, FYI.) An updated, genericized (and better balanced IMO) version of the Herald is presented in Power of Faerun.
Most "generic" FR prestige classes are appropriate to Cormyr, since it (along with Sembia and the Dales) is as default a Realms setting as you can get. I'd say all of the following FR classes work fine in Cormyr:
-Arcane Devotee
-Divine Champion
-Divine Disciple
-Divine Seeker
-Dweomerkeeper of Mystra
-Elemental Savant
-Guild Thief
-Harper Agent
-Harper Paragon
-Harper Scout
-Herald
-Hierophant
-Incantatrix
-Justiciar of Tyr
-Martyred Champion of Ilmater
-Merchant Prince
-Morninglord of Lathander
-Purple Dragon Knight*
-Silverstar
-Spellfire Hierophant
-War Wizard of Cormyr*
*Specific to Cormyr.
I'm leaving out the "villain" PrCs, as those can probably show up anywhere the DM feels they should.