Some of the LTM Cosina-Voigtlander lenses are very good, and they work fine with M- mount adapters. Also much cheaper than the later M-mount versions. I have the 35mm Color Skopar and 90mm Apo-Lanthar, and they're both excellent (modern glass and superb bang for the buck - compared to Leica glass, they're like 90% of the lens for 10% of the cost if buying second hand). The Skopar on my M2 is one of the best camera & lens combinations I've ever used. I also have an old Jupiter-3 50mm f1.5, but these need to be adjusted for accuracy at close focus if used on a Leica (partial dismantle, and need a camera with a back that opens to expose the film plane, if I remember correctly). Something to do with having a Contax focussing helicoid, which has a different pitch from Leica, meaning the displacement of the rangefinder lever in a Leica is wrong for the lens. Calibrating it for accuracy at close focus means infinity goes slightly out, but DoF takes care of the error at that end.
At the cheaper end of things, a Zorki 4 or 4K is hard to beat for value and usability, but can be more of a gamble because they tend to not to be as well maintained as the higher end stuff. (I have a 4 that's well worn and works fine, and 4K in much better condition but has a sluggish shutter - hardly used over the decades and now a bit gummed up).
Most lenses will be fine on the Bessas regarding reach into the film chamber. It's only those with rear elements that extend a long way that are at risk - like the FSU Juipter-12 35mm (Zeiss Biogon copy with a huge mushroom rear element). (That lens is fine on Leicas, incidentally.)