Define "Best"?

What is a "board and batten style house"?

What is a "modern farmhouse"?

Sherwin Williams Oyster White!

Look up old posts from Dutty. Her exterior is Sherwin Williams West Highland White. There are pictures in this thread, which is very old and you need to expand the list of responses. However the pictures were taken on a cloudy day and of course exterior colors will look different in different light, different orientations, different surrounding features like trees, etc. (Personally I love the barn red garage.)

Modern farmhouse is an oxymoron. Modern is a style attributed to the middle 1900's. Contemporary farmhouse would be more appropriate, as contemporary is not a style, it means happening now, mixing in things of the present, trendy.

It's going to depend on your house's elevation and surroundings, window and roof color. You'll see Sherwin Williams "Alabaster" named a lot but I can think of at least one person on this forum who painted samples and found it turned yellow on two of her house sides.

We repainted our house (mostly board and batten siding) white last year. I narrowed down the many decent choices by asking myself what my absolute worst result would be -- if it ended up looking, gray? beige? yellow? too bright? and avoiding whites that leaned in the worst direction. But you won't know until you paint big samples that can be tested on all four sides.