Welcome back, Lew, and so sorry for your wife.
Landscape photography : Framing, light, and sharpness of your lens, are, in my opinion, the main factors for success.
I use Leica R lenses with Z6. Quality of Leica lenses and quality of Nikon body, a reasonably cheap way to get the suitable gear, pricewise. (60mm makro elmarit f/2.8, apo macro elmarit 100mm f/2.8, apo Telyt 180mm f/3.4)
Leica R lenses are more expensive toward wide angle lenses, so I use Zeiss ZM, tiny, lighter and fitting the Z6 very well. (Zeiss biogon 35mm f/2 ZM).
Good shooting !
Francis.