13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Daio the Decrepit60Blasted Lands
Avalanchion58Azshara
Kroshius55Felwood
Niby the Almighty56Felwood
Impsy56Niby's MinionFelwood
Setis61Silithus
Gretheer57Silithus
Lapress60Silithus
Zora59Silithus
Rex Ashil57Silithus
Krellack56Silithus
Grubthor58Silithus
Huricanian58Silithus
Twilight Lord Everun60Twilight's HammerSilithus
Alowicious Czervik10Sweet TreatsOrgrimmar
Emmithue Smails10Sweet TreatsStormwind City
Gluggle37Stranglethorn Vale
Roloch38Stranglethorn Vale
Rippa44Stranglethorn Vale
Kurmokk42Stranglethorn Vale
Verifonix42The SurveyorStranglethorn Vale
Eris Havenfire60Eastern Plaguelands
Stormwind Orphan3Stormwind City
Shellene20Orphanage MatronStormwind City
Tosamina34Orgrimmar
Horde Orphan3Orgrimmar
J'eevee58Scholomance
Xorothian Dreadsteed62Dire Maul
Dreadsteed Spirit60Dire Maul
Lord Hel'nurath62Dire Maul
High Priest Venoxis63Zul'Gurub
Short John Mithril47Stranglethorn Vale
High Priest Thekal63Zul'Gurub
High Priestess Mar'li63Zul'Gurub
High Priestess Arlokk63Zul'Gurub
Death Knight Darkreaver62Scholomance
High Priestess Jeklik63Zul'Gurub
Aspect of Banality60Scholomance
Aspect of Corruption59–60Scholomance
Aspect of Malice60Scholomance

Classic reference data from QuestieDB (Forever data, commit c5de61a), with positions on Forever's zone maps. It doesn't confirm that an NPC, location, quest or item is in Forever.