You can't get ergonomics with a (modern) laptop keyboard. Reaching over the touchpad is at best, a compromise. Unfortunately keyboard at the edge + sidemounted trackball is long dead, and keyboard at the edge + pointing stick didn't last a lot longer.
Last I used a laptop at a desk on the regular, state of the art laptop stands were reams of printer paper. Worst case, you need to actually use the paper in the printer and you're out a stand until you restock.