The Sony RX1/R Mark I or Mark II and the Leica Q are all full frame, single focal length (35mm) compact cameras, albeit you might need quite big pockets. They're all very expensive, like a couple of grand expensive. Build quality and image quality are superb, they have Leica or Zeiss T* lenses, which are some of the best on the market.
The Ricoh GR Mark I and Mark II along with the Nikon Coolpix A are APS-c sensors but again are only single focal length (28mm) cameras. They're tiny pocketable cameras with really good sensors. The GR Mark II is a refresh model but all of them are really getting a little long in the tooth. They all fit in a small pocket and the GR is legendary as a 'street' photographers camera.
The Sony RX100 Mark I, II, III and IV are all 20 megapixel 1" sensor cameras with 28-100mm zoom lenses in the case of the Mark I and II, a 24-70mm zoom lens in the case of the Mark III and IV. The Mark IV has an electronic view finder but is £799!
There are others of course, The Canon G1X, the Fuji X100 series (albeit they are more Rangefinder size than a compact) and I'm fairly certain that Panasonic probably do some really nice compact sized cameras along with Olympus, but I'm not really up to speed with those two brands.
I would love a camera with Leica build quality, a full frame sensor, a Zeiss T* lens with perhaps a zoom range of 24mm to 150mm at f/2.0, a built in EVF, tiltable rear screen, a battery life that would give around 500 shots, a built in flash, waterproof sealing, Image stabilisation, magnesium alloy body and as pocketable as a Sony RX100. If they could get this on sale around £400 I would buy one
Problem is if you tried stuffing that sort of tech into a small body it wouldn't fit, primarily due to Optical constraints, sensor sizes also dictate body size as well along with all the other gubbins you need to fit inside to make it work.
As a result, they're all compromises. The important thing to remember is that they're all tools, even DP's beloved Nikon Cameras and lenses. In some cases even DSLRs might not be up to the job, particularly in the world of fashion advertising, where you probably would have to move up to Digitial Medium Format.
EDIT - I think of all the Cameras I've listed above, the Sony RX100 series (dependant on how much you want to spend) are probably at the sweet spot of compact cameras at the moment.