13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Whitewhisker Vermin52–53Alterac Valley
Winterax Troll57–58
Winterax Berserker61–62
Snowblind Harpy52–53Alterac Valley
Irondeep Trogg52–53Alterac Valley
Alterac Ram50–51Alterac Valley
Wildpaw Gnoll52–53Alterac Valley
Enraged Panther30Thousand Needles
Twizwick Sprocketgrind25Journeyman EngineerMulgore
Fallen Hero58–59Eastern Plaguelands
Cannon Master Willey60Stratholme
Captured Arko'narin48Felwood
Roxxik46Artisan EngineerOrgrimmar
Arko'narin48Felwood
Jessir Moonbow50Felwood
Remains of Trey Lightforge50Felwood
Alexi Barov60House of BarovTirisfal Glades
Weldon Barov60House of BarovWestern Plaguelands
Della49Jessir's PetFelwood
Mukdrak26Journeyman EngineerDurotar
Sprite Jumpsprocket24Journeyman EngineerStormwind City
Jemma Quikswitch24Journeyman EngineerIronforge
Trixie Quikswitch31Expert EngineerIronforge
Franklin Lloyd33Expert EngineerUndercity
Malor the Zealous60Stratholme
Smokey LaRue55Eastern Plaguelands
Lord Maxwell Tyrosus62The Argent DawnEastern Plaguelands
Betina Bigglezink57The Argent DawnEastern Plaguelands
Leonid Barthalomew the Revered60The Argent DawnEastern Plaguelands
Jenna Lemkenilli26Journeyman EngineerDarkshore
Caretaker Alen52The Argent DawnEastern Plaguelands
Duke Nicholas Zverenhoff60The Argent DawnEastern Plaguelands
Watcher Brownell30The Night WatchDuskwood
Milla Fairancora24Journeyman AlchemistDarnassus
Sylvanna Forestmoon32Expert AlchemistDarnassus
Crimson Monk58–60Stratholme
Doctor Martin Felben25Journeyman Alchemist TrainerUndercity
Whuut23Journeyman AlchemistOrgrimmar
Kray25Journeyman AlchemistThunder Bluff
Victor Ward24Journeyman TailorUndercity

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.