Cleveland Cavaliers: House Stark
The Cavs were so close to the top of the mountain; they could have taken the throne for themselves. Those LeBron James led teams of the late 2000's had excellent records but missed opportunities to take the crown and, all of a sudden, all hope was lost with one "decision".
LeBron's choice to bring his talents to South Beach must have felt a lot like Ned Stark's decapitation for Cavs fans and the fallout that ensued definitely had an anger and sadness that would make George R.R. Martin proud. After the "decision", the Cavs bannermen burned jerseys and attempted to revolt with their new King in the North, Kyrie Irving.
Like the Starks, the remaining young people have given hope to the city of Cleveland. Bran's magic is second only to Dan Gilbert's son's ability to win the draft lottery and Arya and the Cavs young core have the potential to get revenge one day, but it's still an uphill battle. And Kyrie, for the love of god, DON'T GO TO ANY WEDDINGS!
Lebron reminds me a lot of Daenerys Targaryen (Khaleesi). Thinks he was born a king and deserves a throne. Has the most powerful allies in dragons (refs), and goes around recruiting the best armies (players). If only Khaleesi humiliated his servants (towel boys) lebron would have every right to file HBO a law suit for copyrights infringements.