Given the lenses you list, I would opt for the 50/1.8 for the testing. You could use the 14-24 or 17-35 but then you'll need a large target to conduct the test at any normal shooting distances. I used a 24/1.4 and a 50/1.4. I was able to see it with the 50/1.4 at 1.4 and although I didn't do it, I have little doubt 1.8 would have been good enough. If you have the problem, you should notice it reasonably well with the 50/1.8. Test shots are in my gallery.
Shoot wide open, high shutter, tripod etc. All the normal precautions to eliminate other causes of poor sharpness. Since it is a differential test, it is easy to diagnose. Center should be best and left and right essentially the same, maybe or maybe not as good as center. If one is not like the others, then you probably have a problem. (If none are good then its probably the test setup.)