...I do not know anything about Black Sails except that it's...pirates? So of course you said "or" but I think "and". So...pirate!AU dwarves? :D

Brilliant! You didn’t specify dwarves and my mind immediately went to the Fundinson brothers!

Balin tries to look respectable. He’s usually the one who has to deal with people and pay for things so it’s important he looks trustworthy. He’d likely be the quartermaster on a ship. He speaks reasonably and carries a biiiig sword.

Dwalin is the opposite. He took a stolen navy overcoat and cut it into a vest using a dagger. I also gave Dwalin a piratey peg-leg because out of the two brothers, he seemed most likely to take the sort of risks that would result in loss of limb. I drew him in the middle of a fracas having lost his primary weapon just to show he’s the sort of bad-ass who’d take on a sabre with a dagger. XD Lookit that face! He’s totally gonna win!