I would choose some kind of Wabi Sabi I would put a spot light on it...

https://www.etsy.com/listing/1631878507/3d-black-minimalist-beach-painting?gpla=1&gao=1&utm_source=google&utm_medium=cpc&utm_campaign=shopping_us_ps-a-art_and_collectibles-painting-acrylic&utm_custom1=k_EAIaIQobChMIpcrFq9X4hwMVvhCtBh35qRrSEAQYEiABEgIofPD_BwE_k&utm_content=go_21500568192_165297117796_707557362452_pla-353975737629_c__1631878507_12768591&utm_custom2=21500568192&gad_source=1&gbraid=0AAAAADtcfRIkdSYVx9tKAm-YQTkmv6iqr&gclid=EAIaIQobChMIpcrFq9X4hwMVvhCtBh35qRrSEAQYEiABEgIofPD_BwE&variation0=4123791044

Look for art that you love. Allposters.com is good source for large pieces. Or go to galleries or art shows.

Why is the wall black? Where is the rest of the room?

You haven't enough context to advise anything. Show more pictures, ALL angles.

IMO no mirroe a really nice piece of art would be my choice .Mirrors need to reflect something worth seeing twice and yours does not , It is however a good idea to show us the whole space . That wall looks very contemporary the gallery wall very country so I need context.

To pick up on what Jan and Patricia said, the shutters are inconsistent with the style of the fireplace as well. Which makes me think maybe what you should be doing is recladding the fireplace in a warmer material that fits with your style better - although I can't be sure what your style is from just one picture. The black is very modern and dramatic. Stone or wood might be a better fit. Or just drywall and a mantel.

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I find the black wall distracting and sort of confusing. Will advise to paint the wall the same color as the rest of the room. That, in itself, will influence what you put on the wall.

I agree the shutters are just an odd choice bit pics of the whole room are needed so when you get around to taking those posting them her ein a comment and answering all the quarions then maybe more help will come Context is everything

I made a new post with updated pictures.

Should kept everything on the same post