Built partly from the pictures of the movie and partly from my imagination here is King Dain Ironfoot.
About this creation
King Dain was a Dwarf of the Iron Hills and cousin to Thorin Oakenshield. Dain was Lord of the Iron Hills until the Battle of Five Armies when Thorin was mortally wounded and he became King under the Mountain. Dain lived past 250 years which is generally the oldest that Dwarves get.
Awesome minifig. Dain is one of my favorite dwarves! I can remember that Tolkien said he was a skilled warrior even in high age. As for the age of dwarves, I think Dwalin was even 340, what is a very high age even for dwarves. (like 114 for humans)