The Greatest Clans in the History of the Clan World

Of all the clans that arose and thrived on the face of the Clan World, which were the ten most powerful? And how is it even possible to select ten clans from among the hundreds that have flourished over the past ten years? Truth be told, any formulation of the "top ten greatest clans" will always be subjective, because all clans were glorious and influential in their own unique way.
But there are some clans that were simply so powerful, large, and influential over the grand sweep of the Clan World's history that they deserve to be called the greatest, no matter the criteria. The reader may note that I left out clans from Nirvana and Transcendence. While I would be the first to acknowledge the importance and legacy of clans from these communities, the overall legacy of these clans tends to be regional at best.
Clan 	From	To 	Duration
Third Order 	2009	2010	1
Fourth Order 	2011	2012	1
SCAR 	2010	2012	2
DayBreak 	2010	2013	3
Akatsuki 	2012	2016	4
Kaori Tribe 	2012	2013	1
Vanguard of Valhalla 	2014	2016	2
Ninjas of the Hidden Mist	2010	2011	1
Kingdom of Elexoria 	2015	2020	5
Society of the Dark Skull	2011	2013	2