My first thought would have been to add a molding that's less than an inch wide about an inch or so above the existing molding. But then I started to wonder, unless you really like the look of wood, what about either painting the wood to match the wall colors so it completely disappears or take it off completely and finish the walls smoothly. A very sleek modern look. Now don't get me wrong. I absolutely love stained wood trim and lots of it. We're in the process of finishing a Queen Anne style Victorian Revival home. I also adore the clean lines of Mid-Century style and was glad to hear you didn't want to choose a style of trim that wouldn't be appropriate for you home. But then you didn't say you had a mid-century home. I guess I think mid century when I hear ranch since I grew up in one. Give me a bit more info and I'll be able to help out more and maybe find some links that will help.