...what jobs are best at tanking the end of the run tenth floor bosses when you have no tanks?

Let's assume you at least have a healer and not a support damage dealer. Because we all know there is no guarantee you'll have a tank or a healer in your group if you are running in a matched party. Four red mages are fun, by the way.

Anyways, what do you think? Who are the tankiest non-tanks for Palace of the Dead?

/discuss