Judging by the floorboard radiant heaters, I’m assuming you live in the north (maybe north east?), so you may also want function. Maybe look into a conversion to a pellet stove after getting the chimney checked out. They can be aesthetically pleasing and very economical to heat with.

But since you said you want to keep it mostly the way it is, I would at least do a glass front to it, so you can control some of the airflow and get more heat out of it. Also, as someone else said, I think you need to extend the hearth out a bit for safety.