Cathedral Gorge comes to mind near Caliente. Part of the appeal f Great Basin are the Bristlecone Pines, but the road to the top of the Snake Range is probably closed for winter. Same with the Success Loop.
If you like old stuff and buildings, there's Cherry Creek, McGill and of course the shops of the Ghost Train.
A couple of hours SW of St. George is Valley of Fire and in between is Gold Butte south of Mesquite though there may be some walking to do to find the goodies scatter there.
In any case, I've always have found something to photograph around Ely in every season, though not always landscapes.