100mm, 4 lenses, 2 primes, 2 zooms, corner.

Here the corner sharpness for the following lenses:

Minolta 100mm macro f/2.8 (a 20 years old copy...)
Minolta 100mm f/2.8 soft focus
Minolta 24-105 f/3.5-4.5
Sony 70-200mm f/2.8 G

f-stop	100 Macro	100 Soft	24-105	70-200G
f/2.8
f/4 (4.5)
f/5.6
f/8
f/11

The primes are best, followed by the 70-200G. The 24-105 never reaches the same level, even at f/11.