See Hardware known to work with KlipperScreen - #74 by CADburry and choose your poison.
But more seriously:
I unfortunately have a screen (only for testing purposes, never used it really. Only have it to give the appearance that I know what I’m talking of when it comes to KlipperScreen) that does not allow turning off the backlight via software and I find this super annoying.
Unfortunately, I cannot give you a good recommendation.