13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Blood Parrot1
Manifestation of Water60
Frail Skeleton1
Onyxian Whelp56–57
Spectral Projection58–60
Rory35
Mossflayer Berserker55
Darrowshire Poltergeist1
Panda Cub1
Mini Diablo1Lord of Terror
Zergling1
Jin60
Audrey Vergara30
Josh Miller35
Lauren Preston40
Kevin Faulder45
Joelle McCarthy60
Charisse Moonrunner35
Ashlyn Vor'lair30
Ann'rimor Falchi45
Jarvis Greenhammer30
Russle Hochstein35
Dillon Gregor40
Diana Battleheart45
Watna35
Jo'bu40
Shal'vol45
Priestess Kara'van60
Danielle Koppen30
Vincent Wilfork35
Nicole Tarlow40
Amber Provost60
Thomas Brady45
Minor Infernal29–30
Illusion of Jandice Barov61
Eldreth Wraith42–43
Arcane Horror58–59
Alzinn Trigger1
The Razza60
TEST GEAR PALADIN1

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.