Community builder is overkill just to get an image.
Here are a few options, depending on how often these are updated and whether you want to allow users to update these themselves.
Of course you can always make a category and an article for each team member, then use the links and urls to load the image in a standard location (override +use css in your template to do this). Use ACL to manage who can change this and to decide if you will allow users to manage.
Use the image field in the contact component, put all of the team members in the same category in contact. Put bio etc in miscellanous information. Only admins can manage this since it is edited back end only.
Use a profile plugin for com_user if you want users to be able to manage for themselves.