I've never been a fan of Tenkeyless boards, because I want my damn keys, but I did like the width savings. A solution?:
https://www.engadget.com/2019/05/30/double-height-keyboard/
https://www.engadget.com/2019/05/30/double-height-keyboard/
The C1000 is a keyboard that, rather than putting the numpad and extra keys to the right of the keyboard, stacks them above the letter rows.