Treasure from Lonely Mountain (gold and silver for Bilbo).
soldiers and supplies
The Orchrist and the Arkenstone
Dain
He is good.
Bilbo, Balin, Bard, Beorn, Bofur, Dain, Fili, Gloin, Kili and many more.
Dain only has a small part in the book, but from what we see, he seems honorable. He made peace with the elves, shows respect to his departed cousin, became king, and went through with the previous deal to share treasure with Bard and the elves.
The Orchrist and the Arkenstone
To keep the promises of the dead.
Dain
He is good.
They are relatives, and also leaders of their respective groups of their people.
Bilbo, Balin, Bard, Beorn, Bofur, Dain, Fili, Gloin, Kili and many more.
Their first request was to let them go through to the mountain, but that was not allowed. At the end, Dain took control of the treasure and re-established the dwarven kingdom Under the Mountain.
The great eagles were allies. Beorn was an ally too. And later Dain Ironfoot proved to be an ally.
Dain is Thorin's cousin, a Dwarf from the Iron Hills. Thorin sends a raven to summon Dain and his army to help defend the treasure under the Lonely Mountain from the men and elves after Smaug is slain. Dain and Thorin join forces with the men and elves to defeat the evil creatures. He is crowned King under the Mountain after Thorin dies in the Battle of Five Armies.
Dain only has a small part in the book, but from what we see, he seems honorable. He made peace with the elves, shows respect to his departed cousin, became king, and went through with the previous deal to share treasure with Bard and the elves.
The dwarfs resettled the lonely mountain (Erebor) and made it their capital, they forged a strong alliance with the men of Dale (who had helped kill Smaug).
If you are referring to The Hobbit, then Thorin.But, if you are referring to The Lord of the Rings, then that would Aragon.