You need a hood so start there and for sure the void behind needs to be closed This would not be a good idea at all so plan on moving that soon. Post a pic of the whole kitchen please post here in a comment DO NOT start another post

Rip that ish apart and fix that dangerous and dysfunctional mess.

Full kitchen shot. Don't mind the clutter.

Complete hot mess. Range should be where the open shelves are, and with a small island running parallel to the sink and range.

WOW

Beautiful space but I would be a little afraid to use that range. Does it feel like it is going to tip over? Was there a cabinet above it that was removed? Is that a dual fuel? I see an electric cord plugged into the wall.

I think you may need to spend money to fix this.. Maybe move the entire sink over to the peninsula and then put the range flush against the wall to the right of the window. Buy inexpensive formica counters from a big box store.

Agree with Hallett. And a hood in that corner could be a great visual focal point for the whole room.

Thanks everyone for the thoughts and advice. Going to get some quotes on the diagonal wall with hood solution.

Start over with a better design. That is one terrible remuddle.

Can you easily lift a hot pan out of that oven? I think having to reach over the open door or approach it from a wedge of space at the side is a safety concern.

How about moving the range under the window and extending the two rows of cabinets -- which look handmade -- into the corner where the range is now?

Search "corner oven" in the Houzz search field. There are a surprising number of discussions and many include photos. Maybe you'll see something there that will help you figure out a solution.

Here are three kitchens that have the range placed in the corner, but the wall behind it was built out on the diagonal.

Great examples @BeverlyFLD...

The ones you show have even more room on either side of the oven door.

Hands down, diagonal wall and hood is the best suggestion.