Which of the following 9mm handguns is best for concealed carry?
'Best' in what regard?
If you 'like' one make/model more than the others, that might influence your choice.
The nature of the carry method, and the specific products (holster & belt) used for concealed carry, can certainly make a difference.
The individual's experience (both familiarity & demonstrated skillset), and the conditions under which the weapon is lawfully concealed (including activities), can make a difference.
I spent a career having to carry either a full-size or compact pistol on-duty (more than a decade working plainclothes), so nowadays (retirement CCW) I typically prefer to either pocket (holster) carry, or pick one or another of my
smaller pistols for belt carry, as needed. My full-size and some of my compact handguns stay in the safe most of the time, except for training/practice & periodic quals. As has been mentioned, getting in & out of cars & chairs all day/night can be an issue when it comes to sustained comfort.
Of course, not everyone can shoot/use the smaller pistols as well as larger ones, so that has to be considered by the individual considering the choice.
I suppose that if I were
forced to choose from among the posted list, and someone else were footing the bill, I'd probably opt for the M&P 9. Almost as compact as the G19, but with more mag capacity and a slimmer, more comfortable grip frame. (In the way of Glocks, I only own a pair of subcompact G26's & a G27, because I don't care for the larger models.)
Suit yourself. Can you manipulate and shoot any of them better than the others? Any hands-on range experience with any/all of them? Just window shopping from among 'favorite' or 'popular' makes/models?