This one is used so often that it verges on a mythological cliché, perhaps because there are always so many celebrities rising from the ashes.
phoenix (FEE-niks) noun
1. A person or thing of unparalleled beauty or excellence.
2. A person or thing that has regenerated or rejuvenated after a great misfortune.
[After a fabulous bird of great beauty in Egyptian mythology. It lived to 500 years and burned itself on a funeral pyre to be born again from the ashes.]
"[Oprah Winfrey] is a phoenix who rose from the ashes and became self-sufficient and highly respected."
-- Beverly Stewart; Small Business Spotlight; The News Journal (Wilmington, Delaware); Mar 31, 2005.