The picture/icon that shows up for my package in the package list is my github profile picture. Is it possible to customize this for the package without changing my github account? I would like to have a different one for each package I create.
No, it just pulls your GitHub user account avatar. But you could submit a feature request for something like that to the settings-view package.
Can you post a link to the issue you opened here? That way others who find this by searching can get linked to it without needing to search some more