[Like the initial post, this is a cross-post, with added mentions and the bit towards JD.]
Since everyone has helped me evolve and clarify my needs and just exactly what I'm actually trying to accomplish and why, I'm going to do a mini reboot and lay those needs out again, just to make sure I'm not missing something... And hopefully get more focused answers. The needs are really the same as before, even though there's some big "on paper" differences than my initial post.
As a TL;DNR, I want to implement smart device user controls so that they appear and operate as if the house had been designed with color smart lighting in mind to begin with. 
As such, I want to maintain both the simplicity and ease of dumb switches, as well as maintain their functionality. In other words, I'll probably add touch-screens/control panels later, but they will be relegated to a couple of high activity/seating areas and not used as the primary day-to-day way to do the simple stuff (essentially, they'll be admin panels for family/guests 
)
As I see it, I can go two routes. The first could be summarized as "replace all dumb switches with smart switches than can control smart devices and/OR the power", as follows (all these numbered "1.n", where my second way of accomplishing things below will be "2.n"):
1.1a) Replace existing dumb switches with powered switches for smart devices (eg to control Hue bulbs - not controlling power).
1.1b) I want to maintain the existing functionality of cutting power to the circuit, for maintenance/emergencies (eg an "air gap").
1.2) I want to add new switches exist to the house where they don't currently [exist] for controlling smart devices (eg Hue lights).
1.3) I want them to match (including the Bonus item below).
1.4) Some of these switches will need be able to do dimming, so there should be an option for 1.1a, 1.1b AND 1.2 as dimmers (though dimmers may be acceptable everywhere... but, I like the Lutron design options with both dimmer and two-button).
Bonus; I also have a couple dumb devices that I would like to control, and would want the switch to control the power for those. Since there's only a couple (I believe literally two), this is no longer a priority for me.
I'm getting the feeling that even with mix-matching, getting these requirements would be tricky at best, and only with matching by overall style, as per @JDRoberts suggestion of paddle-style switches. If someone presented another option that qualifies, then I must humbly apologize, for I have missed it (but I'm going back through them). Seems the tricky part is wired controllers to signal smart devices.
@JDRoberts... Well, just FWIW, paddle-style switches are maybe back on the table (though, I may prefer route #2 below). Second, I am CURRENTLY going through the FAQs and such, but it's taking me a bit because... 1) Against my preference I really should do some actual work (well, what they think of as "actual work"... I keep telling them I am working!), and 2) A lot of it is confusing me. Any rate, you linked to a FAQ that mentions the Gocontrol 3-Way Wall Accessory Switch. Is that anything that's remotely suited for my needs?
The second route (which really isn't about "smart devices") is to maintain separate dumb switches, but not display them prominently on my walls (if I'm picky about wall art... why should I display switches on my walls?!):
edit: All of these can be summarized as "put remotes (eg for Hue bulbs) in front of recessed dumb switches". /edit
2,1) Replace the existing switch boxes in the wall with a "recessed" model (maybe like this??),
2.2) Recess the existing switches (possibly with miniaturized models, if that's a thing),
2.3) Get battery switches for controlling smart devices (eg Hue bulbs) for everywhere (except the two dumb-devices in "Bonus" above),
2.4) Get (or, hypothetically, make) a wall holder for the battery switches that allow easy removal AND have a cut-out back (like the Hue dimmer or Pico mount, but with a hole in the backside - see below for why),
2.5) Place the battery switches over top the recessed dumb switches, where the hole in the mount allows access to the recessed switches behind.
If I want to get at the switch, I pull off the remote, easy. The only issue I can think of (aside from effort and cost) is if I someone walks off with the remote,, it might look ugly/weird. But, they will mostly live on the wall, and I'll pretend like I have the skill to not to do a hack job on the electrical box and in-line switches.
Just FYI, with route #2, I'm leaning towards Lutron (thanks, @SmartHomePrimer [and Mike.Maxwell!]). If I'm not mistaken (for a change) Caseta/Pico allows all of the first route except 1.1a (and half of 1.1b), including Bonus, so it might be nice in case I come across any other places where I need control the power. Or for that matter, scale back my plans on color lighting and just use dumb bulbs.
Again... In general, what I want to accomplish is to design my smart lighting - using color smart bulbs - to be look and work as if the house had been made for them. No superfluous switches, or bulbous mounts over a switch, or mismatched controls, or child-proof locks. If I can't do it from the "smart switch" route, I'll just build the smart remotes over the switches... At least, until someone tells me why I that would be a dumbass thing to try (annnnd... queue JD ).
