13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Spire Scarab58Blackrock Spire
Lady Sylvanas Windrunner63Banshee QueenUndercity
Rexxar62Champion of the HordeDesolace
Onyxia63Onyxia's Lair
General Colbatann57Winterspring
Mezzir the Howler55Winterspring
Kashoch the Reaver60Winterspring
Grizzle Snowpaw59Winterspring
Rak'shiri57Winterspring
Lady Hederine61Winterspring
Azurous59Winterspring
Misha60Feralas
Gubber Blump15Darkshore
Gwennyth Bly'Leggonde21Darkshore
Halycon59Blackrock Spire
Bloodaxe Worg Pup52–53Blackrock Spire
Wep33
Yor35
Staggon35
Tepolar38
Bijou58Blackrock Spire
Rookery Guardian58–59Blackrock Spire
Kibler56Burning Steppes
Opus40Burning Steppes
Burning Felguard56–57Blackrock Spire
Solakar Flamewreath60Blackrock Spire
Ug'thok25Journeyman BlacksmithOrgrimmar
Tinkee Steamboil53Burning Steppes
Gizrul the Slavener60Blackrock Spire
Rotgath Stonebeard31Expert BlacksmithIronforge
Groum Stonebeard25Journeyman BlacksmithIronforge
Thrag Stonehoof24Journeyman BlacksmithThunder Bluff
Dulciea Frostmoon51Cloth Armor MerchantFeralas
Vaelan54Blackrock Spire
Scarshield Infiltrator54Scarshield LegionBlackrock Spire
Ranshalla58Winterspring
Jaron Stoneshaper55Explorers' LeagueWinterspring
Krakle60Un'Goro Crater
Storm Shadowhoof60Winterspring
Aurora Skycaller62Eastern Plaguelands

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.