I bought a stockpile of Microsoft Ergonomic Keyboard for Business (LXM-00001) when they were still available, after Microsoft announced discontinuing their peripherals. I hope they’ll last me for a long time. I don’t know if the curved geometry still counts as a traditional layout for you, though. Incase, who acquired Microsoft’s peripherals IP, has re-released them, but apparently can’t keep up with the orders: https://www.incase.com/products/ergonomic-keyboard
No the single slab of keyboard is not quite what I want. Being able to fully separate my arms feels so much better than scrunching my shoulders all day.
Check out the Feker Alice series of keyboards. The Alice 98 has a full set of function keys & numpad. High quality build, too, I've been very happy with it. The one & only thing I don't like about it is it's missing the Home and End keys, but I can live without them.
https://fekertech.com/products/feker-alice98-qmk-via