My advice would be to embrace the mix! Adding mixed metal will really help the mixed wood tones look more intentional, so you’re already on the right idea with the brass accessories! Brushed nickel and muted copper are good tones to mix in as well.
From the pictures, it looks like you need something going on on your walls, as well. Start hanging some art on the walls, and you’ll be happy with how the dark blocks of wood at hip level suddenly appear a lot less bulky. Interior design is truly 360 degrees, so focus up and away from your wood furniture and I think you’ll be happy with the results!