Chosing Grey Paint - Help Appreciated!

We're doing our trim and wood work in our house first (white) - but in the meantime, we are finalizing our our wall paint colors!! I need your help!

We are picking a yellow for the living room, where our new grey couch will live, and dining room walls and grey for the entry way, stairs and upstairs hallway walls.

The Grey Debate...

Updated with this added option (thanks to Chelsea's comment about what she has in her house):

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Paint: Ralph Lauren Forde Abbey - I like this a lot... as well as the below one, too. Choices Choices. Thanks for all your help and comments - keep 'em coming! :)

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Paint: Sherwin Williams Requisite Gray

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Paint: Sherwin Williams Mega Greige - too taupe?

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Paint: Behr Squirrel - bit more brown undertone?

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Paint: Behr Sparrow - too dark?

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Paint: Benjamin Moore Kendall Charcoal

What do you guys think?? Do any of you have a Grey paint you love, specifically in hallways and entry ways?

Next up...Yellow paint options.