Pentax full info viewfinders.
I can't speak for many cameras other than Pentax, but the LX shows everything, as does the MX. A warning: the LX, while supremely versatile, is not cheap, neither is a CLA (cleaning, lubrication, adjustment) service. Examples may have been heavily used professionally. Depth of field preview, and mirror lockup.
The MX is very small, and basic accessories, such as a winder, are fairly easily found. DOF, but no "official" mirror lockup.
The KX is bigger, no motor or winder, but a fine camera. Not that many of them out there, however. DOF and mirror lockup.
The LX has perhaps the finest TTL meter system ever offered, plus TTL flash. I've taken perfectly exposed pics by moonlight with exposures of 15 or 20 minutes; I've seen shots with exposures of several hours which were excellent. A tripod is recommended, of course!

Shutter speeds are electronically controlled but speeds above 1/70 are usable without battery. MX has a straight mechanical shutter, as is the KX.
Both the LX and MX are system cameras, offering full motor drives, bulk film backs, data backs, and interchangeable viewfinder screens. Good luck on the bulk film backs, though!
I have examples of these three fine cameras and find them all fine user machines.
Another Pentax example is the SuperProgram, which
with an "A" lens will display aperture as well as shutter in two windows below the viewfinder window. It is much like the ME Super, but on steroids, adding the aperture/shutter display, plus depth of field preview. It also has TTL flash, which is an excellent system. A suitable Pentax flash can be bought for $30 or $40. I've just acquired my example, at a very reasonable price, so I don't have extensive user comments yet. As with the ME without batteries nothing works.
Full disclosure: I am somewhat of a traditionalist, in that I like metal cameras! And the whirr/buzz of mechanical shutters. Thus I haven't spoken to the final generation of Pentax 35mm film cameras, fine machines, but not to my taste.
Have a look at PentaxForums.com for full discussions of all Pentax cameras.