I think the issue may be the artwork itself rather than just the placement. The three smaller pieces feel a little fragmented on this wall, especially with several other visual elements already in the room.

I would simplify it and try two coordinating vertical canvases, around 20 × 24 in (50 × 60 cm) each, with a small 2.5–3 in (6–8 cm) gap between them. I think that would give the loveseat much better visual balance without making the artwork feel oversized.

For the colors, I’d stay with warm, muted tones -cream, beige, taupe, soft olive or sage, with perhaps a little warm brown to connect with the upholstery and wood furniture. I’d avoid anything very dark or high-contrast.

A pair of simple abstract or nature-inspired canvases in that palette could make this whole wall feel calmer, more cohesive and intentional.

I would try just the big one centered.

A whole lot going on in this smallish space, so I would simplify as well. Just the one larger piece, centered.

I do not believe I am syaing this but put the TV above the FP on an arm that lets it drop down . Where it is is just confused not at the right height and just looks silly there. I agree the 3 pieces are not good together on that wall the 2 seems okay but I would vote for one larger piece. A lot of eye clutter going on in a tiny space so simple just better.

Will apologize in advance. This comment isn't about the artwork placement. Have you considered installing crown mounding in your room to give it a more finished appearance? Shouldn't really be too expensive.

Starting at the bottom: reposition the rug; pull it up closer to the fireplace and have the frong legs of the sofa on it. The entire room is unbalanced because of the rug.

Art with glass is lost on that wall...all I see is reflection from the window. Find another location for them. Not every inch of wall has to have something hanging on it.

Agree with @Patricia Colwell Consulting about the t v (I am shocked, too). Isn't there an app where you can get art on the screen?

Mirror...front hall, no pillows on the black chairs...too clumsy looking and you lose the effect of the backs. New pillows for the sofa.

Consider a richer wall color.

Van Courtland Blue.

This is the type of TV mount that Patricia described above ...

Standard TV and sound bar

Samsung Frame TV with a mantel mount

I agree with Patricia on the TV. I rarely ever suggest a TV above the fireplace but here would be the place to do it. . There is just way to much going on with the TV shoved in the corner and the abundance on the fireplace area then multiple pieces above the love seat. Plus the fact you also have a wall mounted cabinet. There is nowhere for the eye to rest and for the space to breathe. What does the other side of this space look like? The seating arrangement looks very cramped and shoved in a corner and the dining space there doesnt look ideal. Can we see the rest of this space?

Sorry this is off your topic, but IMO your room would benefit from a slightly different layout. I would utilize the long wall for a larger screen TV with the sofa facing the wall for easy viewing.