Common races - races you could expect to see in an average village among the various lower classes. They have flavour which suits an everyday industrious existence.
Frankly, the idea that dragonborn or tieflings
don't have individuals who work in mines or fields or forges is ludicrous. No matter how the race came about, they're still just people - even when your life is enhanced by magical power or your blood thrumming with the influence of the Nine Hells, you still gotta work and eat.
When I created my most recent setting sketch, I put it this way:
As a frontier town, Solano has always featured a more diverse mix of races than the norm for the Spring Empire. Life on the borders, despite the conservative grumblings of the traditionalists of your grandmother's and grandfather's generation, had always been more concerned with what a person can do than with what that person's ancestry might be.
Most people in Solano are humans, tieflings, or half-elves, representing the three major races of the Spring Empire. There are several families from other races - elves, dragonborn, gnomes, halflings, shifters, and gnolls - in greater proportion than would be found in a town of similar size further to the east, in the empire's former heartlands.
As noted before, the majority of Solano's inhabitants are farmers, growing rice (in paddy fields flooded by channels connected to the old imperial aqueduct) along with other grains. Some farmers raise pigs, allowing them to forage in the fields and forests east of town down in the foothills; these swineherds also often grow fruit and root vegetables on their family lands.
Members of the minority races are over-represented in non-farming trades. Many of those who still work the mines are dragonborn or shifters, while elves and gnolls are prominent woodcutters and gnomes are actually the bulk of the carpenters. Most trade in Solano is based on barter, but there is a steady trickle of genuine coin brought in by traders, the odd visitor, and members of the gallant fraternity of adventurers.
Most people - even most dragonborn or gnolls - aren't adventurers. Sure, the average gnoll might be a subsistence hunter who's not afraid to raid a human or half-elf farmer's land and make off with her cattle to be slaughtered for his tribe, if most gnolls live a nomadic, predatory lifestyle, but that just makes him the equivalent of that human farmer - compared to a gnoll warlord who stirs the tribe to battle, he's not so much.