Well, most of the examples I was going to give (other than maybe the early models of the NEC PC-98?) have already been covered, so let's swing the other way... talking of "computers the size of fridges", here's something exotic: back in the mid noughties I was on an abortive (govt. cuts) radiology technician training scheme at a local hospital, specialising in Nuclear Medicine. Despite having newer, fancier, but smaller machines, our main gamma camera rig was still a fine old warhorse made by Toshiba probably twenty years earlier, if not thirty. An already crusty, networked Sun Sparc II workstation off to one side took care of the detailed image analysis, but it was itself connected (by means I never determined) to the camera's native control/acquisition minicomputer.
Said minicomputer probably had about all the raw horsepower of a ZX81, but it was literally the size and shape of a commercial chest freezer. As in the type you might find in a discount supermarket, or the dingier kind of student dormitory. The kind of thing that really justified the name of "console", because it also served as a major piece of furniture, with a bank of control buttons and knobs built in - but also a shelf for the clunky turn-of-the-80s style keyboard, and an eye level platform for its twin (one for text-based control, the other for rudimentary pixel graphics at something like 256x256), minuscule (9" at best) monochrome CRTs.
And hidden underneath the shelf, on the side of the beast... a pair of honest to goodness 8-inch floppy drives. I never used them in anger myself, as the actual software booted up off some well-hidden internal Winchester (probably with a 12-inch platter providing a whole ten megs, most of which would be devoted to image acquisition buffering), but I saw the service guy who came around a couple times a year to do a bit of preventative maintenance and perform a deeper level of calibration than we were able to do ourselves pull one out of his hardcase the one time. So that's an 8-inch drive seeing active use, in the mid-late 2000s...
There was also a box of blank spares, sitting up on a dusty shelf in one of the adjoining rooms. Can't remember if I purloined one for my own collection of retro junk, but if I did, I've sadly long since lost it. Though I do remember the box being a 3M one, with a remarkably modern-looking design (essentially the same as their late 90s/early noughties 3.5" and CDR branding), with the at-the-time faintly ludicrous seeming claim of a "2MB" capacity (presumably formatting down to ~1.2MB usable?).
I expect the machine itself has also gone for scrap given that the department I worked in was moved to a shiny new facility with all (well, mostly) brand spanking new up-to-date equipment more than five years ago now, and it would have been a devil of a job to relocate the entire rig when 95% of its functionality could be replicated with a smaller, lighter main unit that could be wheeled around by a single person, with a USB-connected laptop looking after the control, acquisition and processing... still, they definitely got their money's worth out of it, and the scrap value alone would probably have been pushing £1000 even if they didn't bother breaking it for parts.
Speaking of 12-inch drives, there is the point to be made that at one time 8-inchers were seen as the compact option - IBM's original floppies were themselves LP-sized, and truly suitable only for room-filling mainframe use, whereas something only slightly larger than a 45rpm single, and a little smaller than a piece of writing paper folded to make a square, is just small enough to be practical when paired with a minicomputer or even an early, still kinda bulky micro.
5.25-inch was considered small enough compared to both to be called "mini floppy", which is why the harder cased, 3.5-and-below types are "micro floppy", and both attract the alternative moniker of "diskette" (the origin of "disk"-with-a-K, as "discette" is too ambiguous) to differentiate from full-size "discs".