Try looking at the Hatteras from Columbia Flooring. It is a 5" driftwood inspired floor.

Water bourne urethane is the closest thing you can achieve to resemeble any woods true natural color without any alterations. Staining can still be done to achieve a color you want if the water urethane doesnt work for you colorwise. But since it sounds like you dislike yellow adding the water urethane OVER the stain will help keep true to the original stain color choice. Adding Oil polyurethane can give the color a richer appearance but does also tend to add a bit of a honey tone in the early life of the floor and then tends to amber with age. Water bourne urethane does age and change tone but not nearly as prevalent as oil based polyurethane.

I haven't used the anthracite gray, yet. But, I have applied, burnt oak, old oak, stripped oak, old gray, weathered gray and castle oak, along with smoke and fume. The colors shown is with 1-1 neutral/white oil on top. The product is easy to apply, it covers like aniline dye, but cleans up easier. Which means you can blend different species with a single color. It needs to be applied perfectly the first time around. It is a reactive stain, it can be unpredictable, which is why spot fixing can be tricky. Anyone who has experience fuming and smoking can easily apply this. Water will reactivate the stain and move it around. You can apply solvent base finishes over it. Water solubles will need to get sprayed for the first coat or use a de-waxed shellac for universal binder or sealer before applying a water base finish over it.

First off, ask the contractor to sand it to smooth. I would chose the country white since you want it to appear lighter and brighter. It would help if you could show us some photos and we could get a better idea of the layout.