13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Bone Mage60
Mortar1
Gremnik Rizzlesprang1
Unrelenting Trainee60
Unrelenting Deathknight61
Unrelenting Rider62
Spectral Trainee61
Rhonin63
Shadow Fissure60
Necrotic Shard60
Cenarion Hold Reservist60
Bile Sludge62
Spectral Deathknight62
Spectral Horse63
Spectral Rider63
Theldren Kill Credit1
Damaged Necrotic Shard60
Crystal Zapper60
Necropolis Controller1
Cultist Engineer60
Caravan Mule50
Plaguewing Slug61
Flesh Ripper61
Plague Flesh Tentacle61
Spore60
Fallout Slime60
Scourge Invasion Minion, spawner, Ghost/Ghoul1
Scourge Invasion Minion, spawner, Ghost/Skeleton1
Scourge Invasion Minion, spawner, Ghoul/Skeleton1
Zombie Chow60
Grobbulus Cloud60
Polymorphed Chicken1
Polymorphed Pig3
Polymorphed Sheep3
Polymorphed Rat1
Polymorphed Cockroach1
Sewage Slime60
Polymorphed Turtle3
Patchwork Terror60
Lightning Totem62

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.