13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Molten War Golem55–56
Fireguard50–52
Blazing Fireguard52–54
Fireguard Destroyer54–56
Twilight's Hammer Torturer50–51
Twilight Emissary52–53
Twilight Bodyguard53–54
Twilight's Hammer Ambassador54–55
Arena Spectator52–54
Quarry Slave46–48Blackrock Depths
Weapon Technician55–56
Bloodhound49–50
Bloodhound Mastiff54–55
Panzor the Invincible57
The Behemoth50
Dredge Worm50–52Blackrock Depths
Deep Stinger50–52Blackrock Depths
Dark Screecher50–52Blackrock Depths
Burrowing Thundersnout50–52Blackrock Depths
Princess Moira Bronzebeard58Princess of Ironforge
Innkeeper Heather30InnkeeperWestfall
Borer Beetle50–52Blackrock Depths
Cave Creeper50–52Blackrock Depths
Christopher Hewen30General Trade Goods VendorWestfall
Angerclaw Bear47–48Felwood
Angerclaw Grizzly51–52Felwood
Angerclaw Mauler49–50Felwood
Felpaw Wolf47–48Felwood
Felpaw Scavenger49–50Felwood
Felpaw Ravager51–52Felwood
Hilary1Redridge Mountains
Effsee1Redridge Mountains
Shawn1Redridge Mountains
Hematos60Burning Steppes
Krom'Grul54Burning Steppes
Thauris Balgarr57Burning Steppes
Gruklash59Burning Steppes
Firegut Captain53
Malfunctioning Reaver56Burning Steppes
Ironhand Guardian57

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.