Default User/Site Owner label

I am setting up a contact form and am trying to set the form to automatically point to the email of the user who registered the site (their role is set to author). Is there a function or label in wordpress for the user who registered the current site?

Gravity forms already has a hook to alter where the notification is sent, I am just hoping WordPress has a function built in for ‘site owner’ or ‘registered user’ or something? This is what I tried (I think I am messing up lines 3-6 a bit):

add_filter("gform_notification_email_1", "change_notification_email", 10, 2);
function change_notification_email($email, $entry){
    $blogusers = get_users('role=author');
    foreach ($blogusers as $user) {
        return $user->user_email;
    }
}

Help is sincerely appreciated on this one, I am not sure where to start looking…