I just dont know, if you want to keep it either more compact, or either more wide-angle-good-optics'n'digital. For the latter,
you would only have to check out a GR(or better a GRII) and buy an additional optical viewfinder. PERIOD. (stop reading here)
But if you are already thinking, "oh, no, i dunno... it should be more compact. Do i really want a wide angle prime or would a zoom be better?? sigh", then i have a little story for you:
The only compact camera that i would suggest right now, with a Viewfinder (but its EVF) is the RX100 V(f:1.8 at the 28mm equiv.). PERIOD.
IMHO, really no compact camera delivers the right bang for the buck, except this little beast. (and i am nearly 100% sure, that this is a fact and not only my oppinion)
(about 95% or more of the compact cameras lack a viewfinder, not to talk about those crappy sensor sizes. (1/3, 1/2.5, 1/2.33) if the camera-makers only could get away from that crap and all start to use at least 1/1.7 sensors... !!!
RX-1 is way too expensive.(and also the first RX-1 is too slow overall -system, not the lens)
and actually the only camera that comes to my mind that would fit the specs you stated you would need, would be the Canon G1X , BUT
the autofocus is very slow, so a showstopper for intuitive shots...
ASB, the only cam i honestly could suggest without having a doubt about anything, would be the "RX100 V" ! please, forget everything else, i searched for a very long time also but whatever i think i found,... either its just way too expensive for what it offers or its just normally-expensive crap that doesnt deliver anything ...
the only idea that comes to my mind if you want to keep it with ricoh-pentax, would also be (ASB) the GR or GRII but neither of those has a VF built in, (you could use an additional EVF, but i guess thats not the deal you are searchin for)
someone stated, that the GR has a dust problem.
only thing that comes to my mind here, that has a hq-sensor and a fast fixed-focal-length lens, has no viewfinder but is weather sealed and also waterproof up to 18m diving depth.
it is called the Sealife DC2000... its the same sensor one would find in some RX100 camera.
its not cheap, but i think, its darn good bang for the buck.
The only solution that would fit everything what you are looking for(if you want to keep it pentaxy), is no compact camera, but a mere Pentax K-70(OVF and relatively compact) with the
SMC Pentax-DA 40mm F2.8 XS mounted.(even the K-S1 would only be a bit smaller)
but if you want a really compact with a viewfinder(though not optical), give the RX100 V a try, or check out the Panasonic TZ-100/101/ DMC ZS-100(U.S. naming)
using a mirrorless system is an option, i also thought that (fujis, panas, whatsoevers...)
but NOTHIN, i repeat NOTHING is as compact and delivers as good as a Sony RX100 V. (its not aps-C sized, but the IQ is pretty close to a certain ISO value)
focus is lightning fast, on time is fast, 4k video(30p), slomo(so high speed recording at 120fps at 1080p or even 500fps at app. 1700x600 pixels, etc., etc.
24pictures per second burst shooting. et cetera, et cetera
my solution to that whole dilemma, that having normal 35mm-framing in a decent compact camera would cost a photographer at least 3000(Sony RX-1 II) or 4000(Leica Q) Dollars,
since we all are still waiting for that digital film canister...
that will make those cheapskates gnashing their teeth and start to produce neat and worthy cameras, was
tadaa: going analogue... and buying a canon 9000f scanner to acompany a nice analogue compact body with a good lens.