I don't believe this information has been posted up to date anywhere, so I figured I make one from my previous list. Here are all of the epics that a player can obtain for free by completing each kingdom's quest line.
Adana: Sparkgrinder - http://ashtender.com/gems/troops/6082Blackhawk: Lil' Johnny Bronze - http://ashtender.com/gems/troops/6274Blighted Lands: Herald of Chaos - http://ashtender.com/gems/troops/6182Broken Spire: Luther - http://ashtender.com/gems/troops/6081Darkstone: Dimetraxia - http://ashtender.com/gems/troops/6150Divinion Fields: Atlanta - http://ashtender.com/gems/troops/6085Drifting Sands: Marid - http://ashtender.com/gems/troops/6159Forest of Thorns: Rowanne - http://ashtender.com/gems/troops/6087Ghulvania: Avina - http://ashtender.com/gems/troops/6094Glacial Peaks: Tassarion - http://ashtender.com/gems/troops/6190Grosh'Nak: Dark Song - http://ashtender.com/gems/troops/6134Karakoth: Ferit - http://ashtender.com/gems/troops/6083Khaziel: Emperina - http://ashtender.com/gems/troops/6091Kheatar: Alastair - http://ashtender.com/gems/troops/6090Leonis Empire: Amira - http://ashtender.com/gems/troops/6226Maugrim Woods: Scarlet - http://ashtender.com/gems/troops/6117Mist of Scales: Raven - http://ashtender.com/gems/troops/6086Pan's Vale: Elwyn - http://ashtender.com/gems/troops/6089Pride Lands: Finley - http://ashtender.com/gems/troops/6093Silverglade: Princess Elspeth - http://ashtender.com/gems/troops/6326Stormheim: Keghammer - http://ashtender.com/gems/troops/6096Sword's Edge: Tau - http://ashtender.com/gems/troops/6095Whitehelm: Lady Sapphira - http://ashtender.com/gems/troops/6088Wild Plains: Sunweaver - http://ashtender.com/gems/troops/6142Zaejin: Brian the Lucky - http://ashtender.com/gems/troops/6092Zhul'kari: Tyri - http://ashtender.com/gems/troops/6084
Blackhawk: Lil Johnny Bronze - http://ashtender.com/gems/troops/6274Silverglade: The Silvermaiden - http://ashtender.com/gems/troops/6327Suncrest: ?
Suncrest: Tezca - http://community.gemsofwar.com/t/spoiler-alert-any-details-provided-are-subject-to-change/1280/2673?u=ozball (SPOILER WARNING! Since putting links in spoiler tags causes you to click the link rather than reveal the spoiler)
Silverglade's storyline Epic isn't the Silvermaiden..... it's Princess whats her name with the selfie reference
Oops, didn't bother checking link, just copied it from what was posted.