laluna, we have oak cabinets in our kitchen and although we couldn't afford to replace or reface them at the time, we had to get a new counter. We opted for Verde Peacock and it's wonderful. We love it. It's darker so it doesn't compete with the oak. Anything in the verde family like Uba Tuba or Verde Butterfly would also look good. In the kitchen forum, there are many who have travertine backsplashes w/a granite from the verde family and it looks wonderful as well.

I do not have the same countertop, but cream does look pretty with oak cabinets. Oak cabinets have some "movement" to them due to the grain and so does your countertop. If the backsplash also has movement, even if it is pretty on its own, the look will be too busy - no place for the eye to rest. Make sure to either remove the microwave, tile behind and replace it or reserve enough tile to tile behind it later should you choose a hood rather than an over the range microwave. As a short person who does not like a crowded cooking space, I would change the micro for a hood, but you may have a different preference or want to wait till the microwave breaks down. My oak kitchen: https://www.houzz.com/photos/my-pics-work-in-progress-phvw-vp~110720042

This is my wood kitchens ides book. You might see a look you like. https://www.houzz.com/ideabooks/75202366/list/wood-kitchens I also think going for a Luxury Vinyl tile might be the way to go rather than wood look. I have a refreshed oak kitchen with oak hardwood floors which I like just fine. However, your cabinets look like they might nearing the end of their life. If a new buyer changes them out, the new flooring may have to go too. Put something in that is neat and clean so the home is move in ready, but that won't be a rip out of expensive new materials if the new owners change things up in a couple of years.

Eversebz We plan on painting the kitchen walls white ( BM Simply White ) along with the rest of our home 😊 But yes, I agree if we weren’t , white subway tile might make the walls look dingy