Factions
There are 4 factions with quests, but only 2 are needed for progression. If a faction is listed next to quest, its the faction it raises. For progression you need to do Wraithguard quests that give Wraithguard Leadership Faction to at least Apprehensive to start doing WL quests. To start Frostcrypt side raid progression quests you need to get WL to ally.
Coldeye Clan (CC)
Nightmoon Clan (NC)
Wraithguard (WG)
Wraithguard Leadership (WL)
Warning: Never kill Wraithguard mobs (non-kos giants mostly outside the gate of Valdeholm). If you get kos, only way to fix faction to do progression is to kill undead "of zek" giants deep in Frostcrypt.
CC and NC start kos and you raise faction by killing oposite faction. You can get some quests by hide/sneak.
Icefall Quests
No Faction
Alibee - Timmi Fell Down the Well!
Coldeye Clan (Dubious Faction)
Pack Leader Orgak - Free the Wolves
Gorbak - Gorbak's Supplies: Bear Claws; Gorbak's Supplies: Mammoth Hides; Gorbak's Supplies: Mammoth Tusks
Kregnad - Kregnad's Supplies: Bear Meat; Kregnad's Supplies: Bear Meat; Kregnad's Supplies: Mammoth Meat
Ironskull - Skullcups
War Captain Rockfist - Kill da Kobolds; Tainted Delivery
Gnashclaw Stonefed - The Sacred Stone I
Nightmoon Clan (Dubious)
Verkorn - Charming My Dear; Prized Leopard
Thunderfist - The Sacred Stone II
Malgen - Thinning the Pack
Wraithguard Quests (Dubious)
Wraithguard Thentil Strongarm - Armor Supplies -WG
Wraithguard Thentil Strongarm - Runic Ivory - WG, WL
Wraithguard Lorekeeper Fenegar - Construction of Shadows - WG, WL
Wraithguard Quests (Amiable)
Wraithguard Thentil Strongarm - Shade's Bane - WG, WL
Wraithguard Quests (Kindly)
Wraithguard Lorekeeper Fenegar - The Shattered Gift
Note: Due to faction requirement changes some of these quest may actually require higher faction. Will update when i verify factions.
Wraithguard Leadership Quests (Dubious)
Wraithguard Lorekeeper Fenegar - Ancient Tomes - WL
spirit of Aethmir - Return Aethmir's Pendant of Zek to the Wraithguards - WL
spirit of Thurgant - Return Firgant's Copper Ring to the Wraithguards - WL
spirit of Kalmaer - Return Skalmarg's War Banner to the Wraithguards - WL
spirit of Thontik - Return Thontik's Blade to the Wraithguards - WL
Wraithguard Leadership Quests (Apprehensive)
Wraithguard Warden Hrosigar - Orcish Dissention - WL
Wraithguard Warden Hrosigar - Warning Signs - WL
Wraithguard Sergeant Aerik - The Tribal Chieftains - WL
Wraithguard Lodigar - Lodigar the Recruiter - WL
Wraithguard Lodigar - Wraithguard Vengeance - WL
Commander Haesgrin - Haesgrin #1: Incursion - WL
Wraithguard Leadership Quests (Kindly)
Commander Haesgrin - Haesgrin #2: Shade Bounty - WL
Commander Haesgrin - Haesgrin #3: Weapons Acquisition - WL
Frostcrypt Progression (WL Ally)
Wraithguard Heimgul - Bypass Heimgul
Fergarin Bardon I - Altar Escort (Not Progression) - WL
Fergarin Bardon I - Fergarin's Marks (Not Progression) - WL
Fergarin Bardon I - Fergarin #1: Intercepted Correspondence - WL
Fergarin Bardon I - Fergarin #2: Lost Letter - WL
Fergarin Bardon I - Fergarin #3: Confession - WL
Fergarin Bardon I - Fergarin Raid #1: Kill Kangur
Fergarin Bardon I - Fergarin Raid #2: Udengar the Traitor
Fergarin Bardon I - Fergarin Raid #3: Speak with the King
Wraithguard Sergeant Thavin - Raid Expedition: Frostcrypt #1
Commander Haesgrin - Raid Expedition: Frostcrypt #2