13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Mosshoof Stag51Azshara
Mosshoof Courser52–53Azshara
Timberweb Recluse47–48Azshara
Mistwing Rogue49–50Azshara
Mistwing Ravager52–53Azshara
Forest Ooze52–53Azshara
Sah'rhee30Razorfen Downs
Deathly Usher50Blasted Lands
Muck Splash47–49Searing Gorge
Tyrion's Spybot25Stormwind City
Sandfury Zealot44–45
Muuran40Superior MacecrafterDesolace
Royal Historian Archesonus50Ironforge
Riding Ram1Wetlands
Riding Tiger1Tanaris
Riding Horse1Tanaris
Skeletal Mount1Tanaris
Riding Raptor1Tanaris
Deviate Python18–19Wailing Caverns
A tormented voice50Burning Steppes
Franclorn Forgewright60Burning Steppes
Anvilrage Overseer48–49
Anvilrage Warden49–50
Anvilrage Guardsman50–51
Anvilrage Footman51–52
Anvilrage Soldier52–53
Anvilrage Medic52–53
Anvilrage Officer53–54
Shadowforge Peasant52–54
Doomforge Craftsman52–54
Anvilrage Marshal54–55
Doomforge Dragoon54–55
Doomforge Arcanasmith54–55
Anvilrage Reservist54–55
Shadowforge Citizen54–56
Anvilrage Captain55–56
Shadowforge Senator55–56
Warbringer Construct53–54
Ragereaver Golem54–55
Wrath Hammer Construct55–56

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.