Poor men, you’re all confused aren’t you?
It depends not only on how you dry them, but what they are actually made of.
If they are pure cotton – use them for rags, you’ll never iron them crease-free if they’re dried in a tumble drier.
The more polyester that is mixed in with cotton, the less creased they’ll be after a tumble in the dryer.
As someone said, only half the wash load when you’re drying, and a good steam iron if you need to.
DISCLAIMER – Assuming you mean work-type shirts, I’ve not washed and dried one of those for many, many years.