I am not a pro. But that is so many different wood choices going on, that I think you need to simplify and just paint the baseboard instead of adding a whole 'nother wood. I'd be choosing a white that matches the walls, because I'd want to unify something...

As for the carpet, I'd choose a neutral or calm color that complements the flooring downstairs.

Walnut for the railing? Does it look nice with that gray, rustic flooring? I'm asking. I don't know. But that would be a big concern if you ask me.

I appreciate your response. Paint is our plan but I can't come up with a color for that or the carpet. I feel like we have done so much dark so I wanted to change up the banister. I thought the walnut might be closest to the elm in the kitchen. We have some walnut furniture as well. Still in search of and appreciate all advise.