I've got 3 that really stand out as looking good on the shelf. Front, back, spine, all beautiful.

The barnes and noble hard cover classics are generally good looking. My favorite and the only one i keep on my shelf is the complete Sherlock Holmes. The pages have gilded edges to match the overall aesthetic too. And I love that it's actually printed on the hard cover instead of just a pretty dust jacket.

The Poppy War trilogy has beautiful dust jackets. Simple and clean. Babel by the same author is also beautiful, and I scooped a waterstone edition with black edged pages. I think R.F. Kuang cares about her books looking good, and I fully support it.

I also have a copy of the histories (Tom Holland translation, viking publishing) that is also very handsome.