When you say “run a scene” do you specifically mean run a zwave scene (local scene or central scene, these are two different command sets)? Or do you mean run a smartthings scene? These are very different functionality, and some of the devices that work for zwave scenes will not work for smartthings scenes because they don’t report button presses to the hub But instead rely on Z wave direct association.
Also, the smartthings platform has significantly changed in the way that buttons are managed between the old app and the new app, requiring some major updates to the DTHs, and not all of the original authors are still around to do those updates. So quite a few multi button devices that used to work don’t work right now, although some of them might be made to work again if somebody wants to put in the coding work. 
And to be honest, I just don’t feel a high degree of confidence that smartthings won’t change a bunch of stuff again over the next year, so I’m hesitant to suggest anybody invest in hardware for devices which currently seem to be in architectural flux.
So…
My recommendation at present would be an inexpensive Wi-Fi phone as a wallmount control panel with one of the third-party customizable dashboards on it, either actiontiles or sharptools.
Here’s a recent thread discussing those options: