On one end of the scale are Leica M series cameras and lenses and on the other are a vast collection of mostly Japanese fixed and interchangeable lens rangefinders. There are oddball Soviet and European makers, too.

I'd investigate the film experience before buying a film camera. If you want to take the plunge buy something in proven good condition, as repairs are hard to find. I'd go 60s-80s SLR myself, as the selection is vast. The pentaprism hump is a small price to pay for avoiding the complexity of a rangefinder mechanism.