I’m renovating two bathrooms where I’d like to mix metals, but for some reason even though I’ve read all the posts I can find on how to do it and have looked at a billion pics, I can’t decide the best way to do it. I’ve roughly photoshopped a few possibilities and would love some advice! Also, do the shower fixtures have to match the sink faucet finish? Like if I put a matte gold sink faucet, do I also need to put a matte gold shower faucet? Any input is appreciated!

See pics below:
For the bathroom with the double vanity, I have already bought the sconces which are chrome. The vanity is also purchased, and is the light grey colour but I was thinking of maybe painting it navy blue, hence the navy pics.