13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Umi Rumplesnicker57Winterspring
Trull Failbane55Felwood
Witch Doctor Mau'ari55Winterspring
Blackhand Incarcerator59–60Blackhand LegionBlackrock Spire
Blackhand Elite60–61Blackhand LegionBlackrock Spire
Blackhand Assassin60–61Blackhand LegionBlackrock Spire
Blackhand Iron Guard60–61Blackhand LegionBlackrock Spire
Emberstrife61Dustwallow Marsh
Murkdeep19Darkshore
Gyth62Rend Blackhand's MountBlackrock Spire
Bayne10Tirisfal Glades
Ressan the Needler11Tirisfal Glades
Fellicent's Shade12Tirisfal Glades
Sri'skulk13Tirisfal Glades
Kergul Bloodaxe61Warsong Gulch BattlemasterThunder Bluff
Gruul Darkblade50WeaponsmithAzshara
General Drakkisath62Blackrock Spire
Yaelika Farclaw55Reagents & PoisonsAlterac Valley
Rage Talon Dragon Guard60–61Blackrock Spire
Shrye Ragefist55Food and DrinkAlterac Valley
Trayexir12Weapon MerchantDurotar
Rage Talon Captain62Blackrock Spire
Rage Talon Fire Tongue60–61Blackrock Spire
Xabraxxis19Darkshore
Spire Spider57–58Blackrock Spire
Spire Spiderling55–56Blackrock Spire
Crystal Fang60Blackrock Spire
Elu28Wind Rider ApprenticeThousand Needles
Omusa Thunderhorn55Wind Rider MasterThe Barrens
Altsoba Ragetotem40Weapon MerchantFelwood
Sanuye Runetotem15Leather Armor MerchantThe Barrens
Ravaged Cadaver56–57Stratholme
Mangled Cadaver55–56Stratholme
Broken Cadaver55–56Stratholme
Spectral Citizen55–56Stratholme
Ghostly Citizen56–57Stratholme
Vengeful Phantom56–57Stratholme
Wrath Phantom60–61Stratholme
Skeletal Guardian55–56Stratholme
Skeletal Berserker56–57Stratholme

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.