13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Isaac Pearson22The Barrens
Summoned Incubus20Orgrimmar
Cyriden Farseeker27Ashenvale
Relathor Moonsong27Ashenvale
Polymorphed Apprentice1Elwynn Forest
Cut-throat Mugger10Ironforge
Wandering Swordsman7Elwynn Forest
Son of Arugal24–25Silverpine Forest
Liv Bradford30BartenderStormwind City
Stuart10Stormwind City
Soboz8Undercity
Adventurer's Remains1Teldrassil
Adventurer's Spirit1Teldrassil
Ada Gelhardt10Duskwood
Boarton Shadetotem30Rogue Trainer?Thunder Bluff
Gru'ark10Orgrimmar
Raluk7Durotar
Razormane Poacher7–8Durotar
Gillgar7Tirisfal Glades
Darmak Bloodhowl10Soul BrokerDurotar
Gaeriyan60Tanaris
Altar of the Light1Ironforge
Odd Melon1Tirisfal Glades
Frozen Trogg9Dun Morogh
Jorul8Dun Morogh
Blueheart10Tirisfal Glades
Bruart10Ironforge
Delwynna35Monster HunterDarnassus
Bruuz20The Barrens
Heretic Idol1Loch Modan
Mowgh8Teldrassil
Relaeron30CaretakerDarnassus
Sickly Deer5Darnassus
Graix18Loch Modan
KackleUnknownLoch Modan
Lady Sedorax18Darkshore
Horror of the Deep20Westfall
Defias Scout14–15Westfall
Jixo Madrocket20Amateur DaredevilStonetalon Mountains
Unsuspecting Pridewing19–20Stonetalon Mountains

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.