If you live somewhere cold where you’ll want heat in your garage, I would personally do a heated floor.
I’ve had lots of time playing with a corn stove in a garage, a wood stove as well, and wall mounted electric heaters.
In my opinion, floor heat is the way to go. I’d maybe toss a wood stove in there that CAN be used if needed, but in the meantime unless it was needed just make a decoration out of it.
Yes if you're in cold country heated floor is the only way to go. House and garage.