The following NPCs can be found in Loch Modan.
Questgivers[]
Alliance[]

Ando Blastenheimer
[5-30] Standing Up
[5-30] Fight the Hammer
[5-30] The Winds of Loch Modan

Ashlan Stonesmirk <Gunsmirk>
[5-30] Clutching at Chaos
[5-30] Servants of Cho'gall
[5-30] Gor'kresh
[5-30] Ando's Call

Bingles Blastenheimer
[5-30] Wing Nut
[5-30] Bird is the Word
[5-30] He's That Age

Cannary Caskshot
[5-30] A Load of Croc
[5-30] Smells Like A Plan
[5-30] Axis of Awful

Captain Rugelfuss
[5-30] In Defense of the King's Lands
[5-30] A Decisive Strike
[5-30] Onward to Thelsamar

Dakk Blunderblast
[5-30] Looking for Lurkers

Daryl the Youngling
[5-30] The Joy of Boar Hunting
[5-30] Vyrin's Revenge

Huldar
[5-30] Protecting the Shipment

Jern Hornhelm <Explorers' League>
[5-30] Resupplying the Excavation

Magmar Fellhew
[5-30] Gathering Idols
[5-30] Joining the Hunt

Marek Ironheart
[5-30] Hornet Hunting
[5-30] Foxtails By The Handful

Mountaineer Cobbleflint
[5-30] The Trogg Threat

Mountaineer Kadrell
[5-30] Out of Gnoll-where
[5-30] Stormpike's Orders
[5-30] Suddenly, Murlocs!
[5-30] Buzz Off

Mountaineer Stormpike
[5-30] A Tiny, Clever Commander
[5-30] Kobold and Kobolder
[5-30] Filthy Paws
[5-30] Who's In Charge Here?
[5-30] The Bearer of Gnoll-edge
[10-30] Checking on the Boys

Mountaineer Wallbang
[5-30] Bigger and Uglier

Pilot Hammerfoot
[5-30] The Lost Pilot
[5-30] South Gate Status Report

Prospector Ironband

Rusted Skystrider
[5-30] Skystrider's Heart

Scout Dorli
[5-30] A Nasty Exploit

Safety Warden Pipsy
[5-30] Thistle While You Work
[5-30] Defcon: Bobcat

Stolen Explorers League Document

Torren Squarejaw <Explorers' League>
[5-30] Heartfelt Appreciation

Vidra Hearthstove
[5-30] Thelsamar Blood Sausages

Vyrin Swiftwind <Innkeeper>
[5-30] Vyrin's Revenge

Wanted!
[5-30] WANTED: The Dark Iron Spy
Neutral[]
Class Trainers[]
Alliance[]

Belda Wildheart <Hunter Trainer>

Dargh Trueaim <Hunter Trainer>

Claude Erksine <Pet Trainer>

Faldoc Stonefaith <Paladin Trainer>
Galda Bronzeblade <Rogue Trainer>
Gindle the Green <Mage Trainer>
Grendin Swiftaxe <Warrior Trainer>
Grenhild Darktalon <Shaman Trainer>
Priestess Baerla <Priest Trainer>
Solbin Shadowcog <Warlock Trainer>
Profession (Tradeskill) Trainers[]
Alliance[]

Brock Stoneseeker <Mining Trainer>
Deek Fizzlebizz <Engineering Trainer>
Ghak Healtouch <Alchemy Trainer>
Kali Healtouch <Herbalism Trainer>
Warg Deepwater <Fishing Trainer>
Merchants[]
Alliance[]

Aldren Cordon <Clothier>
Cliff Hadin <Bowyer>
Drac Roughcut <Tradesman>
Gothor Brumn <Armorer>
Greishan Ironstove <Traveling Merchant>
Honni Goldenoat <Baker>
Innkeeper Hearthstove <Innkeeper>
Irene Sureshot <Gunsmith>
Karm Ironquill <Mining Supplies>
Kat Sampson <Leather Armor Merchant>
Khara Deepwater <Fishing Supplies>
Morhan Coppertongue <Metalsmith>
Nillen Andemar <Macecrafter>
Rann Flamespinner <Tailoring Supplies>
Thorvald Deepforge (Weaponsmith)
Vrok Blunderblast <Gunsmith>
Vyrin Swiftwind <Innkeeper>
Xandar Goodbeard <General Supplies>
Yanni Stoutheart <General Supplies>
Various Services[]
Alliance[]

Eeryven Grayer <Gryphon Master>
Gravin Steelbeard <Stable Master>
Innkeeper Hearthstove <Innkeeper>
Lina Hearthstove <Stable Master>
Thorgrum Borrelson <Gryphon Master>
Vyrin Swiftwind <Innkeeper>
Other Notable NPCs[]
Alliance[]

Bailor Stonehand
Kelt Thomasin
Magistrate Bluntnose
Miran
Mountaineer Bludd
Mountaineer Brokk
Mountaineer Dalk
Mountaineer Cragg
Mountaineer Droken
Mountaineer Fazgard
Mountaineer Flint
Mountaineer Ganin
Mountaineer Gwarth
Mountaineer Hammerfall
Mountaineer Harn
Mountaineer Janha
Mountaineer Kalmir
Mountaineer Kamdar
Mountaineer Langarr
Mountaineer Luxst
Mountaineer Modax
Mountaineer Morran
Mountaineer Naarh
Mountaineer Ozmok
Mountaineer Pebblebitty
Mountaineer Rockgar
Mountaineer Roghan
Mountaineer Stenn
Mountaineer Swarth
Mountaineer Tyraw
Mountaineer Uthan
Mountaineer Veek
Mountaineer Wuar
Mountaineer Yuttha
Mountaineer Zaren
Mountaineer Zwarn
Neutral[]

Ashtail (Rare)
Hostile[]

Boss Galgosh <Stonesplinter Chieftain> (Rare)
"Commander" Nazrim
Emogg the Crusher (Rare)
Foreman Sharpsneer
Geoshaper Maren (Rare)
Gor'kresh <Disciple of Cho'gall>
Gorick Guzzledraught <Dark Iron Spy>
Gosh-Haldir <The Clutch Mother> (Rare)
Grizlak <Associate Troggwhacker> (Rare)
Kubb <Master of Meats and Fishes> (Rare)
Lord Condar (Rare)
Magosh <Stonesplinter Tribal Shaman> (Rare)
Morick Darkbrew <Dark Iron Courier> (Rare)
Nix (Rare)
Ol' Sooty
Optimo (Rare)
Saean
Sagepaw <Mosshide Chieftain> (Rare)
Shanda the Spinner (Rare)
Whitefin (Rare)