Unfortunately all your options require custom work: It looks like you need an 18" corner cabinet. You will have to modify the last wall cabinet on the left. As I am eyeballing it, you should be able to cut the last cabinet in the middle and then shorten the left section to fit the space of the wall next to the door trim. It's an option that makes the area looks symmetric. Or you can install shelves over the sink. I would not recommend it because it will take the looks away. And the last option will be to remove the last cabinet, shorten it so it fits over the sink and install a single cabinet where the double one was. This will leave a triangle space behind the corner where the two cabinets will meet. You can block the space under it. Hope this helps!

Having overhead cabinets can also give little privacy...OR Go for sliding/folding shutters. could be closed when kitchen is not in use. As shown in reference picture. Kitchen when open... Kitchen when closed...

Usage of granite should only be in the dry areas as its slippery and kitchen is the place where you can never guarantees. If you have that type of working in the kitchen then you can think of using the stone. As a designer My personal suggestion will be not to use it in the kitchen.

I will suggest you to go with a teal or muted green to add freshness. kitchen needs to look lively and fresh.