It's a very very deep rabbit hole.
Maybe you could get one of massdrop’s full-except-for-numberpad keyboards, and then get a separate USB number pad?
https://kbdfans.com/collections/diy-kit/products/pre-orderkb...
Full size are rarer and more expensive. There might be some other options.
Honestly the GMMK full size is pretty nice and you can pick whatever switch you want. It doesn't have a custom case like the one I linked above, but its aluminum and you can customize everything else. Some people have even dissassembled the case and painted it.
Among mainstream brands, Ducky and CoolerMaster are supposed to be much better (I have no experience with these either).
I like it so much I'm using it with both my computers with keyboard/mouse sharing software.