A mason
There are corner fireplaces and there are corners near fireplaces that are called nooks.
A person that makes candles is called a chandler.
In general, no. There are some wood stoves that are called fireplaces (free standing metal) but they are not fireplaces. A fireplace is permanently built into the structure.
the person who makes spelling mistakes is called cacographer.
The person that makes and sells sweets is called a confectioner.
They are called Electric Fireplaces. They come in many styles, colors and designs. They can be either plugged into a standard 120v outlet or hardwired to the home at 270v.
A person who makes things out of stone is called a stonemason or a stone carver.
A person who makes saddles would be called a Saddler.
A yule log
A person who makes mirrors is called a mirror maker or a glassworker specialized in mirror production.
A person who makes whiskey is called a distiller.
A person who makes idols from stone is called a stone sculptor or a stone carver.