For me, 99% of film cameras have everything required. A viewfinder, and full manual control. All the cameras you list look pretty good to me, Pentax LX would be top of my list though. OM4Ti is a little electronic for me, I think Leica SLRs lack the charms of the RFs, and not worth the pennies IMHO.
For medium format, Rolleiflex offers a gorgeous camera at a good price. If you can get along with a TLR, the lenses are amazing and have a real "look", shot wide open, and plenty sharp when stopped down to f/8 or whatever. I wish I could get on with a TLR, as they are great value, very small, make great pictures and are beautiful objects.