I agree with the above - taupe, mushroom, stone, pewter. I love these colors too, although I feel like I can wear both warm and cool tones.

Grey, charcoal, silver, taupe.

You could also try icy white, icy pink or icy blue--though the latter two are not really neutrals.

I say step away from the beige....

I'm in the same boat - I love these colours as neutrals, but have had to accept they belong on others. There is a whole bunch of styling and looks that I've had to say good bye to, but why would I want to look dead in my clothes?