Yes, that is actually the goal of the cheek implant for men...to provide angularity. A photo would help to evaluate your specific situation. In addition, adding some angularity to the jawline will help.
There are variables to consider such as the thickness of the existing cheeks and the size and contour of the implants considered. You make it clear what you don't want but a thorough consultation will be necessary for you and the surgeon to discuss your alternatives and the contour and definition you do want.
Cheek implants are inserted underneath a flat maxilla to give a rounded augmentation to that area. They are not angulated, which would give a very unnatural appearance for an implant. For many example, diagrams of the implants and more information, please see the link below