I think it is necessary to distinquish between those tyres that are difficult to fit and remove (with or without levers or aids ) and those tyres that are quite simply incorrectly sized. Tyres like anything else manufactured of rubber cannot be precisely sized as can metal rims.There is always faulty batches of course to add to the problem.

Its not much help to a poster to state that a particular tyre is not a problem because it fits perfectly without problem on a different wheel the same as it is pretty pointless saying there is nothing wrong with a particular male and model of wheel because a different tyre will fit fine.

There is no doubt that some tyre and wheel combinations are more difficult than others .There is also no doubt whatsoever in my experience that some tyres are made to incorrect tolerances and are unlikely to be suitable for purpose on any wheel.

What I think is needed is to collate everyone's experiences and put them together into a excel type spreadsheet so that anyone can select a tyre for their wheelset based on others personal experience and rating.

What I would propose is this .

We state the make and model of the wheel with appropriate model number as appropriate.(Factory wheelsets only to start with)
State the make and model and size of brand new tyre that has been fitted to that wheelset.
Then a rating is given to the ease with which the tyre was fitted to the rim for the first time.
The rating should be short and simple such as A,B, & D
A] fitted and removed easily without any significant force but perhaps with assistance of tyre levers.Easy to
B] Fitted ok but required tyre levers and some considerable effort. Tube pinch likely or possible.Possible to fix flat on the road with difficulty
C] Tyre does not fit without levers and considerable force. Tube pinch or rim damage likely.Impossible to fix flat on the road.
D] tyre does not fit to rim.