Your fireplace looks great by itself. But I would keep the pictures on the mantle anyway. The only thing I would change is the frames and mats. Black frames are stealing attention from the pictures. Try choosing more neutral colors both for frames and mats. I think white and grey will match perfectly.

You have a very nice space. The brick white is great. It appears you can’t really use those chairs much? I would sell them. Move TV to that wall. Get slim console and add slightly bigger TV to simply set on the console. Get a couple stools to put either side if you need extra seating periodically. Then art over fireplace with minimal decor.

I say nothing on the mantel, but the fireplace looks unfinished. Here are a couple ideas: Black Metal Surround with Copper Mantel continued as side trim Floor to ceiling treatment using the same materials

Remove the mirro it reflects nothing worth seeing twice . I do not like all the stuff on shelves in kitchens but if this is the look you love then get piece of art thay would look great in the kitchendecor and put it on the mantel to beging with then candles more like the ones in the kitchen only a bit taller and bigger around . IMO the Edison bulbs in all the fitures are casting a yellow glow on everything IMO not falttering but you need to decide if that yellow glow is what is making your kitchen feel warm along with the kitchen wall color, which I bet if you changed all your bulbs to LED 4000K ,would look very different too.