Lamplighters turned on the flame-powered streetlights of yore
Depending on the time period, they might’ve lighted the lamps with a long stick with a wick at the end, or climbed a ladder and struck a match. Power companies took over this sort of thing in the 20th century, but lamplighters are still a tourist attraction in a few towns around the world, like Brest.
"Lungs" fanned fires in alchemists' workshops
You wouldn't expect alchemists to keep a lengthy payroll, but even borderline wizards need some help. As you can imagine, the employed servants known colloquially as "lungs" were exposed to all sorts of fun toxic chemicals in their line of duty and, unlike the plague doctors, they didn't get the benefit of a beak mask.