The correct answers to the above solution-question are:
As "wp_get_current_user" only is available for logged in users.
<?php if(wp_get_current_user('editor')) || (wp_get_current_user('administrator') { ?>
<!-- Stuff here for editors or administrators -->
<?php } ?>
If you have a special plugin that gives multiple roles to users?
<?php if(wp_get_current_user('author','editor')) { ?>
<!-- Stuff here for author and editor -->
<?php } ?>
If you want to see if the current user is either editor or administrator
<?php if(wp_get_current_user('editor')) { ?>
<!-- Stuff for the editor here, at least he is identified -->
<?php } else { ?>
<?php if(wp_get_current_user('administrator')) { ?>
<!-- Stuff for the administrator here, at least he is identified -->
<?php } else {
} ?>