Exclude subscriber users from user list

This new method should work. It looks at all the capability values to find “subscriber”, and hides it.

Try this query

$wpdb->get_results(
    "SELECT display_name 
    FROM $wpdb->users WHERE 1=1 AND {$wpdb->users}.ID IN (
        SELECT {$wpdb->usermeta}.user_id FROM $wpdb->usermeta 
        WHERE {$wpdb->usermeta}.meta_key = '{$wpdb->prefix}capabilities'
        AND {$wpdb->usermeta}.meta_value NOT LIKE '%subscriber%') ORDER BY display_name ASC" 
);