There is a line of lutron switches that are dead simple, no smarts, no hub … and a cute little remote that everyone in my family uses to “all off” the interior lights.
We have a no smart devices policy in the house and these make the cut …
EDIT: From my notes ... the specific product line is "maestro wireless" and I have MRF2-6CL switches paired with "pico" remotes. This is as opposed to the caseta line from Lutron which is quite a bit "smarter".
I still use HA on a RPi4 for other things, typically via Zigbee, but the Casetas always work like you'd expect from a light switch while also enabling smart stuff like voice control or automations.
(Search the page for "Original Smart Fan Speed Control Switch", there's seemingly no way to link directly to the requisite page section... which is a thing I could rant about but will not).
My solution to that was to buy a Zigbee controller to go inside the fan. I wish Lutron sold some kind of standalone fan controller you could shove in there but alas.
One thing that stands out with Lutron products is their use of a unique spectrum[0], unlike almost all other smarthome products that share the same noisy bands.
[0]: https://assets.lutron.com/a/documents/clear_connect_technolo...
These things are installed in big fancy commercial buildings where there is an expectation that they last longer than the warranty, which is reassuring.
These things actually do pretty well at power conservation at these scales, but it's a little fuzzy if it will do the same for a home. Just swapping out LED for incandescent gets you pretty much all of the bang for your buck, but if you have people in your house who are allergic to turning off lights, the occupancy sensors will help a bit.
Lutron is a real company as well, an not an Amazon company, which is not nothing.