I suppose my first mf camera would be an old Kodak folder. Took 620 (or 820?) film and had the door in the back with a stylus. A great camera to use and still have it.
Then around 1970 or so, I was making plans to "go pro"... That added a Mamiya C330 to the kit. Can't say enough good about that camera. Still have it, still use it. Just put a half dozen rolls through it this past weekend.
But all these small formats don't get used like they used to... So when do we do "the first LF camera"??