How about bee wax? Pottery? Glassmaking? Even metal crafting with copper bars? You can set some of the crafts for ornamentation, specially you have already stockpiles linked to do it safely?
I won't answer in general, but will say why these are not feasible in my case.
1. bee wax is very slow in production, I have about 30 hives, and it is a rare occurrence bee was is produced. There is a maximum number of hives (40?), so production cannot be increased. One worker is enough, and it cannot be really automatised, because of lack of substrate.
2. pottery needs source of clay, which is rarer in my forts than sand. In fact I import it. But if there's clay, and magma kiln, they sure, why not. But magma kiln can be used only for pottery and quicklime, so making many workshops rarely used is kind of waste.
3. glassmaking is too important to me. I make crafts fulfilling needs only for the sake of fulfilling needs. I don't need stone crafts, or wooden crafts, I even mostly destroy them, not bothering with selling (to remove items from the world and not clutter item lists). I do need glass items - blocks, pots, pump parts or trap parts, and it would be hard to separate their production from production of throw-away "items of art", only to fulfil a singe need. I have a small number of glassmakers, but they are very skilled, no need for amateurs. Also creating more magma workshops only for this, kind of waste again.
4. metal crafters are rare, and I prefer only two or so trained in it to continue, and not dilute the experience amongst many others. Assuming there is a source of copper (or other cheap metal, which is not always the case, I had embarks without any military metal), there is also a need for processing ore - long and arduous task. I don't need every magma forge I have, but I need every magma smelter, to smelt worse item, goblinite and trade items (because my site is low in good quality metals). This makes metal much faster than from ore, but not really fast enough to have permanent orders, except maybe for metal bolts in one forge.
Also establishing magma forges just to fulfil needs is even more resource and space consuming than ordinary workshops. Still, I do make some small orders (for example for rollers) to fulfil needs AND train a crafter or two, but use general forges, without personal limits, so they can be used for other things.
I'd like to point out that dwarves making metal items, or glass in my case, also have needs, and these needs are fulfilled just by running the forts. The point of designating workshops used only to fulfil needs is to make some use of resources which you have plenty of and which doesn't compete with "real" production, hence the woodcrafters, stonecrafters and the like.
13 jobs in total/1 craftdwarf's workshop.
I don't get the number.