A good middle ground is to use a portrait that obscures some key facial markers while still looking intentional. From the suggestions here, the most practical options are:

• use a side profile or partially turned face
• obscure part of the face with a hat brim, shadow, hair, or even a camera in a mirror selfie
• change high-recognition features such as hairstyle or facial hair
• use an artistic rendering, such as a drawing, watercolor effect, or stylized edit, if that fits the platform

In general, hiding one eye or part of the face makes both human recognition and many face-detection systems less reliable, since eye placement and overall facial geometry are important cues. Hats and shadows can also reduce recognizability by hiding hair and face shape.

For a professional result, keep the image intentional: clean lighting, simple background, neat clothing, and only mild stylization. Heavy blur, novelty accessories, or extreme effects can look strange or unprofessional. A tasteful profile view, partial shadow, or artist-rendered portrait is usually the safest balance between privacy and credibility.