Could you not use a flat mud ring and mud over the edges?
https://www.homedepot.com/p/4-in-Square-Single-Device-Mud-Ring-Flat-787/100686866
If it doesn't recess enough to plaster over, mount your switch in one side and use a receptacle/blank combo cover plate.
The existing box does not have the screw holes on the corners for that and I was hoping to use the left gang.
I wou,d use 2 regular switches instead of the stacked switch.
and
+1 IMO using a stacked switch is a last resort. Difficult to turn on the right circuit as the switch moves horizontal instead of the normal vertical. Even if it is compliant (which I doubt), it will make future work difficult.
The point is to use less cover plate sq inches over the backslpash tile. Too much plate coverage would be ugly and detract from the kitchen.
The existing switch plate one goes past my tile line about a half an inch... (I want to follow the cabinet edge straight down so it will have to be moved anyway... unless I can cover up the right gang and tile over it.
I was thinking the same thing though... using a single would make future work difficult. However I am using a 2 gang with 2 double stacks on the entry wall for 4 sets of lights, so they would kind of match... The boxes will be compliant in ref to ci. as it stands I have two options:
I have a 4x4 box (like a 52171 vn) with single gang plate (centered) to use (I have both plastic or metal)
a Carlon RD30-6R.
you didn't mention if the 2 gang box is a switch box or a junction box. If it's a junction box you can mount an offset mud ring. Garvin Industries have them.
Using two individual switches to take up the 2 gang box will give you the best adaptability for the future.
I have not seen an offset one yet. Thanks... Currently I have a dual gang switch box.
Maybe you guys are right, I should just move the box and keep 2 switches, however on the other wall I will need 4 so a dual double gang sounded like a good idea. (Hence the continuity as the switches in the kitchen would match.) A third option would be 4 gang and 2 gang. or 2 - 3 gang boxes. But that is quite a bit of real estate over the tile.
If there is something I have not considered please let me know. There is one other thing about decora style, which is the finger prints suck. still black or bronze plates are going to get dirty.
Thanks for all the comments so far.