Thorin IIThorin II Oakenshield - So Thrór was killed by the Orcs and Thráin II died in the bowels of Dol Guldur; that left Thráin's son and Thrór's grandson, Thorin Oakenshield as the Dwarven king.

 

"So Thorin Oakenshield became the Heir of Durin, but an heir without hope.  When Thráin was lost he was ninety-five, a great dwarf of proud bearing; but he seemed content to remain in Eraidor.  There he laboured long, and trafficked, and gained such wealth as he could; and his people were increased by many of the wandering Folk of Durin who heard of his dwelling in the west and came to him.  Now they had fair halls in the mountains, and store of goods, and their days did not seem so hard, though in their songs they spoke ever of the Lonely Mountain far away.  The years lengthened.  The embers in the heart of Thorin grew hot again, as he brooded on the wrongs of his House and the vengeance upon the Dragon that he had inherited.  He thought of weapons and armies and alliances, as his great hammer rang in his forge; but the armies were dispersed and the alliances broken and the axes of his people were few; and a great anger without hope burned him as he smote the iron on the anvil.  But at last there came about by chance a meeting between Gandalf and Thorin that changed all the fortunes of the House of Durin, and led to other and greater ends beside." ~The Return of the King (Appendix A)