Sounds beautiful! As long as it strikes s a balance mixing can work! Assume you have stainless appliances? If so, you already have some silver going on :)

I do not think all of this has to match but IMO the gold is one of those things that will soon say dated just like brass did before. So do the pulls and the light both easily changed down the road if needed and the rest in silver tone . I will say pot fillers are IMO never a good idea. I have clients who cook huge pots of soup and pasta often when I have done for them is a small sink next to the range makes so much more sense than a pot filler . The pot of boiling water being carried is the big issue . I think I have 5 clients now where we did this and they all love it.