For a traditional farmhouse look, try 2½-inch V-bead (far left) or 1⅝-inch V-bead (top). Wider "boards" tend to look less busy in a large space. There are also custom styles, like casual, random-width V-bead (near left).
@David LaFond Beadboard on the ceiling. Because you said you wanted to redo the drywall in our bathroom, ceiling and all, and I will not be hanging overhead drywall again. Let's consider this for the entire hallway too. LOL!