The Olympus Pens are getting on a bit now but Yashica made a series of half frame autofocus 35mm SLR's with a fixed zoom lens in the late 1980's called Samurai. They give good results. There was also one which took APS film.
Hmmm, not sure what that means. One would pretty much expect that any camera getting close to 50 years old would need a good CLA before use. The F series are wonderful little cameras with razor sharp lenses. You can't go wrong there if you are looking for half frame.
The Tessina does not produce a half-frame size image. Its image size is 14X21mm. Half-frame is 18X24mm. When you are using a format this small, every mm counts. At 16.7X25.1mm, the film size APS-C format is very close to half-frame. There were many very small cameras made for APS film but I don't know whether any of them offered full manual control. If you found one the availability of film and processing would be the next issue. Konica made a series of "eye" half frame rangefinder cameras. Some were sold under the Wards name. These are somewhat rare.