I’m very shamefully plugging my own design here, since you brought it up - @chimeforest, myself, and many others have been discussing smelting and bloomery furnaces:
I don’t think it’s ‘time’ for any of this to be implemented yet though, as mining is still in the early stages, but feel free to have a look/leave feedback. I do like the first pic you posted!
Oven (for cooking) is definitely something I’d like to see soon
