Updated list - if anyone has changed or I've missed anyone off, let me know.
Starting quests:
Bluegalaxy
Darkwarlord
Leoandra
Barb
Eraadia
Shadowlabs (first fragment):
Garnet
Steamvault etc (2nd/3rd fragment):
Ixion
Timmymallet
Escape from Durnholde (pre-quest to final key quest):
Black Morass:
Argent
Geometrix
Hanny
Parella
Damien
Elwoods
Neckslasher
Attuned:
Dougan
Ashling
Puman
Kibano
Mumford
Arkarian
Brasso
Trucao
Rogcas
Prox
Moonelf
Evader
Heav
IBlameyou