Share pics of what you're describing.

Great house - love all the art! I wonder about Ben Moore Navajo white? We used this recently in almost an entire upper level and have big east windows, west windows and south windows - warm for sure but not overly yellow in my opinion https://www.kylieminteriors.ca/paint-color-review-benjamin-moore-navajo-white-oc-95/

if you prefer to stay with Behr® paint, I'd sample Behr Blank Canvas.

same LRV as your Organza Peach, but definitely not yellow.

If you want to warm it up some,

I'd sample BM Fossil

BM Frostline . IF you want a white for trim and the fireplace.

accenting the fireplace wall would not be my first thought

... how about accenting the ached niche wall? BM Coriander Seed would be interesting.

If you want to go lighter, but still warm, you can try BM White Dove.

I also have colorful art, warm fabrics and oak floors and the BM White Dove worked well with those and kept the space light/bright.

I had first painted the house in BM Winds Breath, but quickly decided it was too dark and too yellow/gold and repainted with the BM White Dove. I had used the Winds Breath because it looked great in my parents house and didn't look yellow/gold there. Make sure to test any color in your space!

Consider B.M. Swiss Coffee in an eggshell finish for the walls, and Swiss Coffee all the trim...everything you have white now (including the fireplace). Do satin for the finish.

Accent wall could be navy. The large shelf piece is dwarfing the fireplace. Is there any other spot for it? In its place the leather chair/ottoman/floor lamp would be cozy.