A poster put in a sapele kitchen and it really darkens over time. The darker is the look they wanted and were surprised how much lighter it starts out. If I remember correctly, it shows the grain. So, yes you do not want a busy floor. I have learned here when doing wood floors with a wood kitchen, to have at least a two shades difference.

Actually, my sister was always drawn to hickory flooring and ended up with birch with her nutmeg colored cabinets, and loves them. They have plenty of grain character, just not the contrasting color. When looking with her, I was surprised at the differences between different hickory floorings. I think you have a good idea in buying a box and laying it out to see. We had natural cherry cabinets in our last house, and wouldn't describe them as being at all busy. They have some grain variation, yes, but it's not too wild, unless you're looking at a rustic or character grade cherry. I'd be more worried about the base colors not going together, rather than the grain patterns.

Here is chairs I have selected. 6 regular chairs no arm chairs

I am not sure if this is helpful or not. In my new house, I am going with rustic hickory natural cabinets and dark stained rustic hickory doors. I know hickory can be very busy, especially rustic hickory. However, on the dark stained doors the grain is not that noticeable. In this picture you can see the natural and the dark stained rustic hickory.