I will start with what seems to be some of the best rated cameras among professionals. Oh yeah! There are professional photographers shooting pinhole even though most of them use their pinhole cameras not professionally but as hobby.
The Zero 612F and 612B are multi-format which you can shoot 6x4.5, 6x6, 6x7, 6x9 and 6x12. So you can choose whatever format you like with a single camera on your hands.
Their large format 4x5in is a zone plate pinhole camera with multi-focal length which can be set as 25mm ultra large angle, 50mm angle and 75mm angle.
They also have some nice extra accessories like shutter release cable, exposure scale, zone plates sets and adaptors, and viewfinders.
Their middle format system usually delivers vignettes, specially when wider than 6x6. It also can happen on their 35mm multi-format. The vignettes can be seen as charming or irrelevant for some photographers but for some others it is considered as deal breaker. Specially for those who prefer shooting panoramic.
The RealitySoSubtle 4×5in is a super wide angle large format camera with 3 pinholes in it, to correct subject distortion on the image making it very appropriate for architecture photography for example.
The RealitySoSubtle 6x17 panoramic camera is best known for its double-pin, or double shutter pinhole camera, making it able to move the horizon (or the image) up and down on the frame without have to tilt the camera, avoiding distortion on the ground, sky, buildings, horizon line and so on. It also has a curved plane which avoids images getting vignettes, because the curved plane makes the whole negative area in the same distance of the pinhole, receiving the same amount of light in the entire frame.
And the RealitySoSubtle 6×6 that will be released in 2015. It looks like to be a pocket version or little brother of 6x17, with two pinholes in it and flat plane, but for 6x6 negative frame.
4x5in camera up to 225mm focal length.
5x7in camera up to 300mm focal length.
8x10in camera up to 450mm focal length.
11x14in camera up to 675mm focal length.
Clipper 6×18 one of the very few 6×18 production cameras ever made with a curved back plane and shutter release. Flyer 6×6 is a square format pocket version 3d printed cameea. They both seems to have a fair good quality image, specially Clipper 6×18.
Easy 35 is the 35mm version they say will be soon released.