I own about a dozen or so (plus maybe a 1/2 dozen cardboard pinhole camera kits I haven't assembled).
To explain I'm a camera collector as well as a photographer, so these have been acquired over the years for the collection (with a couple of exceptions).
A few cameras do "stand out"
35mm ONDU pinhole - the magnetic rear door and knob attachment is very clever, and it is beautifully made.
Wooden NOON 6x17 cm pinhole camera. I bought it because it was at a great price (I got 3 pinhole cameras for $150 delivered) - I couldn't make one for the price
Holga wide pinhole - 6x12 camera with a nice shutter function and convenient to use (once you re-glue the tripod socket back in - they all seem to fall out!)
Diana pinhole - why? Because the 3 lens pinhole is interesting - especially with the multi colored filter
Pinhole Blender - a metal tin fitted with a pinhole - you use a 35mm film run from cassette to cassette. It has a curved film plane, and depending on how far you wind you can either take individual photos or "blend" the pictures together.
Lensless Camera Co 5x4 Camera. The one I have had been converted to use a lens, and I had intended to convert it back to pinhole. But when it arrived form overseas I saw how awkward the film holder design was to use, and thought "there had to be a better way to do it", so made my own 5X4 pinhole..
Watkins Pinhole Lens - not a camera, but a wooden spring loaded pinhole lens with a swinging metal lens cap that could be mounted into the hole of any camera's lens board. Made around 1900/1910. Very clever design.
However I do have 2 favorites:
PIN ZIP - a cardboard pinhole camera taking 126 cassettes. I saw a picture of one when I was in high school around 1980, and was fascinated by it. I got one by mail order a few years later (my first international mail order purchase - and I mean mail order. A international money order was mailed in an envelope as payment, and as if by magic the camera turned up a couple of months later). Fun to use and the results are very "pinhole"
ZERO 2000. This was bought around 21 years ago, not long after they were first manufactured. It is an amazingly sharp, well made wooden camera from Hong Kong. I've taken my best pinhole photos with it.
And a honorable mention - around 20 years ago I met a photographer named Peter Bowes. He had designed and was building commercially a pinhole camera with an interchangeable front panel. When you bought a camera you got 2 lens panels with it - both with pinholes fitted. The flat panel gave 1 focal length, and the recessed panel could be reversed giving a wide angle or telephoto "lens". Mine was unique because it came with a 3rd panel for stereo pinholes..
Most of the cameras took 5X4 film holders. I used to own one that took 8X10 holders (sold a few years ago to Chris Reid in Sydney - the best commercial b&W printer in the country), and also one that was a fixed focal length that took RB 67 film backs. I recall Peter made one for himself that had a 20 inch focal length...that produced interesting results..
And I wish I had a Mottweiler P 90 panoramic camera - it is a true work of art. If only they were cheaper
Cheers, Andrew