All good questions! To come as close as possible to the frameless look, make sure your framed cabinets are full-overlay and that the fillers come with an overlay - will be the same thickness as your doors so that everything is on the same plane as much as possible. For the refrigerator "frame", you could specify a 3/4" panel for the right and left of the refrigerator with the cabinet above the refrigerator being the same width as what is called out for the refrigerator cut-out - see example below. Check very carefully the samples from your cabinet supplier for the maple - manufacturers do have some darker stains but they can be muddy looking. The oak might be a better option.

Vintage Revival of Dutch Colonial Kitchen · More Info

Thanks. I never heard about an overlay on the fillers. That would help! I will definitely ask about that.

I think I understand what you are saying about stained maple. Sometimes you can't see any grain at all when it has been stained.

Yes, that is one of the selling points for maple. However, the natural color of maple is more yellow which makes some finishes look a little muddy.