My personal opinion is that the Herman target is the best of the bunch for one very simple reason that I learned at my various rifle shoots at CFB Borden...
There is a clear and defined aiming point on Herman to concentrate on when shooting for score, and that happens to be the white on the back of his wrist.
All the other targets have smaller, oddly shaped, and off center aiming points. They look like fun targets as is, but with a small tweak, #1 could be very servicable and a good update to good ol' herman.
#2 looks too cluttered and would not show up as well with irons.
For the record, I don't like #3 much, as it reminds me strongly of Counter-terror/ SWAT type forces, ie shooting the good guys. (edit, noticed this has been noted before me as well.)