I know it's difficult to find the perfect gray. I looked for a while and found this one that I love! The first floor of my home is Agreeable Gray by Sherwin WIlliams. Take a look at my living areas to see what this gray looks like.
It definitely changes based on the light, but overall it maintains a nuetral gray tone. It's the color that I recommend to all my clients, and the one that I often see in recently flipped homes!