I had a similar set of typing habits when I started and found that the bfo9000 suited my needs, may be worth a try for you.

It is ortholinear, rather that the row staggered layout you requested, but does allow the “overreaching” typing style.

https://keeb.io/products/bfo-9000-keyboard-customizable-full-size-split-ortholinear

I have a larger build and nailing down the ergonomics is really hard without a split board.

I could use a unibody split but this is just easier to adjust and travel with this way.

I could also use either half independently. (with a quick firmware change on the right, but still)

Choc red pro’s, for now

I use one for volume and one for scrolling right now.