Genuine likeness requires the model to learn your face. The route is LoRA training: you train a small add-on model on fifteen to twenty photos of yourself, then invoke it in every prompt.
Photo selection determines the result. Use pictures from different angles, in different light, with different expressions. If they are all from the same angle, the model learns that angle rather than your face, and likeness collapses when you try another one.
This process is most mature in the Stable Diffusion ecosystem; Leonardo AI also offers its own model training and provides an easier route that needs no technical knowledge.
For a corporate headshot, though, the safest route is still shooting a real photograph and using AI to adjust its background and light. That way it is genuinely you and the result still looks professional.