My kitchen has brass for the cabinet pulls and handles with stainless for the appliances and faucet. Two metals, looks great. If pewter is what you really want start with that. I’m thinking the first thing to do is buy yourself a sample pewter pull or knob and see how it goes with your kitchen IRL.. If you like the look then you can get a replacement faucet in either pewter or stainless if you are worried about everything blending together. Even If you keep the present faucet till you get around to doing that I’m pretty sure visitors won’t start shrieking when they spot it. No, they won’t even notice it. I can’t say I love oil rubbed bronze - not because it isn’t handsome, but because I suspect it will be dated as a finish in a couple of years. Pewter and stainless seem more timeless. Congratulations on your new home. :)

Satin nickel would be fine with the stainless sink. Chrome (my personal preference) would work just as well. Black for cabinet pulls and knobs will relate nicely to the black counters. You might find this guidance helpful: https://mariakillam.com/less-is-more-kitchen-or-bath-hardware/comment-page-1/ Here they have black cabinet hardware, a chrome faucet and brass on the fixtures.

I think you are with wiith the 2 finishes

I would do satin nickel. ....brushed stainless faucet. With that? Same in hardware, or even a warm burnished brass.