13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
High Order Messenger10Zephras Isle
High Order Messenger10Zephras Isle
Princess1Westfall
Tavern RegularUnknownWetlands
Ice ElementalUnknownWinterspring
Deepscar BruteUnknownWinterspring
MiloUnknownAlterac Mountains
ColdraspUnknownTirisfal Glades
Tallstrider HatchlingUnknownDarkshore
Countess BunidictUnknownAlterac Mountains
Count Ash BunningtonUnknownAlterac Mountains
Duchess ElisabunUnknownAlterac Mountains
Baron Von BunwickUnknownAlterac Mountains
TailypoUnknownAlterac Mountains
BubUnknownAlterac Mountains
Marsh SkulkerUnknown
Yiyo Nightwalker55Orgrimmar
Kitzy Werkblaster22The Barrens
Temple Highguard60Darnassus
Damin DawnshadowUnknownDarnassus
Iron Kingsguard60Ironforge
Pollero ReneUnknownAlterac Mountains
AradiaUnknownStormwind City
An'drak55Orgrimmar
Evermore55An'drak's PetOrgrimmar
Maximus Warwick15Elwynn Forest
Culli Springwind10Zephras Isle
Pallwick Boneset20The Barrens
Zeglo KruptorrUnknownUndercity
Barrelmaker Ishtar35Undercity
Bub1Undercity
Nyx1Undercity
Poe1Undercity
Relogrim GoreaxeUnknownOrgrimmar
Kihea Ragetotem55Thunder Bluff
Gabbel Shattergale10Zephras Isle
RosieUnknownHillsbrad Foothills
Battlesmith Vaelgrim53Ironforge
Larkin SmokethornUnknownDarnassus
Belarysa Moonveil12Zephras Isle

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.