13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Frostwolf Shaman58Alterac Valley
Death Lash57–58Dire Maul
Lieutenant Largent59Alterac Valley
Lieutenant Stouthandle59Alterac Valley
Lieutenant Greywand59Alterac Valley
Lieutenant Lonadin59Alterac Valley
Lieutenant Mancuso59Alterac Valley
Hive'Ashi Ambusher56–57Silithus
Coldmine Peon52–53Alterac Valley
Coldmine Miner58Alterac Valley
Commander Mortimer61Alterac Valley
Commander Duffy61Alterac Valley
Commander Karl Philips61Alterac Valley
Frog1Dire Maul
Hydraxian Honor Guard57Azshara
Subterranean Diemetradon46–48Maraudon
Seasoned Guardsman58Alterac Valley
Seasoned Mountaineer56
Seasoned Defender59Alterac Valley
Seasoned Sentinel59Alterac Valley
Seasoned Guardian59Alterac Valley
Seasoned Legionnaire58Alterac Valley
Seasoned Warrior56Alterac Valley
Veteran Defender60Alterac Valley
Veteran Guardian59–60Alterac Valley
Veteran Guardsman59Alterac Valley
Veteran Legionnaire58–59Alterac Valley
Veteran Mountaineer57Alterac Valley
Veteran Sentinel57Alterac Valley
Veteran Warrior57Alterac Valley
Stormpike Mine Layer59
Frostwolf Mine Layer61
Stormpike Bowman59–60Alterac Valley
Frostwolf Bowman59–60Alterac Valley
Master Engineer Zinfizzlex60
Frostwolf Shredder Unit60
Irondeep Miner52–53Alterac Valley
Irondeep Peon52–53Alterac Valley
Stormpike Shredder Unit60
Sagorne Creststrider50Shaman TrainerOrgrimmar

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.