That being said, you can pry my Harmony Ultimate from my cold, dead hands. I'm not looking forward to the day I have to get rid of it, because there's really nothing out there to replace it with.
Honestly I'm not a huge fan of the "weird looking button on the wall" approach of some of those devices. I have to replace wall switches anyway to get stuff to work, and I don't like "No, don't use THAT switch, press that little button thing next to it".
The closest thing I found was a Zooz ZEN32 [2] which is what I'm trying now.
Leviton makes one [3] which looks nothing like their z-wave dimmers. Lutron Caseta has some stuff that might work but I didn't want to go down that proprietary path (non-zwave). Inovelli is supposed to be making a 5-button controller [4], and their dimmers look great -- but the keypad is vaporware so far, and the rest of their switches have been out of stock everywhere for months.
[1] https://i.imgur.com/jLmGpdT.png
[2] https://www.getzooz.com/zooz-zen32-scene-controller/
[3] https://www.leviton.com/en/products/VRCS4-M0Z
[4] https://community.inovelli.com/t/z-wave-5-button-scene-contr...
If I recall, I tried that Leviton and actually chose that Lutron Caseta one instead:
[5] https://www.lutron.com/en-US/Products/Pages/SingleRoomContro...
It did scenes, but also worked for normals wanting to press normal switches.
I forget the name of the thing I used to translate, it was the popular competing home hub in late 201Xs.
there are a variety of HomeKit buttons that are sold as e.g. dimmers or multi-bulb, but in fact can trigger arbitrary homekit devices, scenes, automations, etc. i’m guessing these fall in the category you say “comes close”?
an example of what i mean is “Philips Hue v2 Smart Dimmer Switch and Remote” which is actually 4 arbitrary device, scene, or automation buttons that magneticallly stays on wall or comes off to be a remote. there are also a few beautiful button sets made with wood, fabric, etc., launched on kickstarter. by working with homekit, you can be sure they will not require their proprietary cloud to stay functional.
that said, i’m a fan of ipad touch wallmount, like this in white:
https://www.amazon.com/VidaMount-Wall-iPod-5th-Mount/dp/B01N...
with this you get arbitrary button sets for arbitrary systems, and price is competitive with locked-in options — remember the very early days “Philips ProntoPro” universal remote with arbitrarily programmable LCD screens that could emulate any physical button layout?
or if you want something that does that for limited scenes, plus AV remote any house guest can pick up and use without instruction, there’s the interesting LogiTech Harmony Hub with the “Companion All-in-One” remote that doesn’t have a screen but does have buttons for scenes, super useful if you’re in the Alexa or Hue systems. i use the on-remote buttons for the lights of the room the remote lives in.