One other possibility is a Zeiss Ikon Ikoflex with a Tessar or Novar. Again, it's not as smooth as a Rolleiflex, but it's a very sturdy camera. There are numerous prewar and postwar versions. Most have the Tessar. Prewar cameras also offered a Triotar, while postwar cameras used a Novar. And like any older camera, assume that it needs to be serviced unless otherwise stated.