In 4 of your 8 photographs you have the same shirt on, blue striped
Quality of photo and pose aside
Which of these images does a better job of showcasing you as a model, the one where you are the biggest or the one where you are dead center in the image and only a very small part of the image?
My suggestion, get a clean shaven head shot with a tie on
Add a full length standing in dress pants shirt and tie, think a simple solid blue shirt
Wish you well