Honestly, I'm not loving the sofa color with the rug. It seems to be too gold and there's no gold in the rug, even though it's full of beautiful colors.

But since you asked about pillows, I think you can do better than either of the two photos you posted. I would prefer something with red in it, red/navy/pink/beige. And they don't need to match.

it's such a personal choice, I prefer to stay in the same color family. I sledom do symmetrical anything. More texture rather than color. I agree that the rug is a real statement.

For me, not large enough to define the area especially when the room is part of a dining space.

IMO if you need to move pillows to sit down there are too many pillows and in this case any print will fight with the rug. At most I would do one pillow on each side and maybe bolster type and in a color from the rug. Textured for sure and then maybe a throw .

The room is the keeping room off kitchen which we don’t use a lot but I understand what you mean. Here is one on each side. How long of a bolster were you thinking? And what color bolster? Should I do away from a print for the side pillows? I tried a solid on each side and it looked kinda blah.

Would your rug like to live in another room so it doesn’t fight with couch? The pillows are just encouraging the fighting so they can wait their turn once the rug/couch fight is resolved.

That rug is beautiful and does not "fight with the couch". I have almost the exact same color combo in my living/family room - beige leather sofa and red print oriental rug. I'm not a pillow person but I'd do solid colors from the rug - red and navy.

The current pillow you have is beautiful. You just need one pillow infront that is smaller a bit to tie all the colors in your living space. The pink blue rug is gorgeous with the yellow. Go a little richer mustard if you are open to buying new covers.

These combinations all look good. The yellow striped pillow with mustard back pillow is the most subtle. Adding some stripes, ribbed pattern and shiny textures can bring extra light AND beauty to the already beautiful space.

Since you barely use the room, decorating is perfectly fine but I think you have lovely pieces already and a curated coffee table already. No need to further accessorize. Your current pillow is fine and placing another color or harmonious color ( especially yellow, blue or pull from the rug :pinks) will make a huge difference even if nothing else is done.

Love the dark blue pillows and throw from Maureen. Perfect with the rug.

This pillow from Joon Loloi brings in pretty texture and adds colors from your rug and your sofa. https://www.joonloloi.com/shop/product/naima-pillow?color=Blue_Multi&size=22x22_Pillow 

It doesn't read as much of a distinct print, which I think works well with your rug.

Maybe instead of pillows - a throw - to tie the rug to the sofa and break up all the gold

Ok not so sure about the blue now

Maybe one of the lighter blues in the rug.

The issue with the darker blues is that they are solid AND dark. It gives a more heavy look that absorbs anything else around it. Hence the reason the striped blues or any other lighter shade ( mustard or a white pillow or even coral) etc would go better. I would stick with a mustard or ochre shade and one that has a different pattern than what you have and /or a solid that  Is not so off from your original yellow and beige pillow.

The good thing about pillows is they're cheap and easy to play around with!