Once the good people of that fair nation decide they have had enough of that Cuban-heel wearing Punch & Judy puppet Sarkozy and his Cheshire Cat dilettante musician wife, they're going to need someone proper to fill out the Élysée palace. Here are the options.

If you're an old-school Legitimist-Orleanist, then Henri VII is your dude:
http://en.wikipedia.org/wiki/Henri,_Comte_de_Paris,_Duc_de_France
But look at those teeth! That would not look good on a Euro.

For the Legitimist-Anjou claimants (those rascals!) Louis XX is the man for you - far more pleasing to the eye:
http://en.wikipedia.org/wiki/Louis_Alphonse,_Duke_of_Anjou
Fun fact, as well as being the supposed King of France in exile, he is also a banker.

Of course, if you're a complete mental, you might think this handsome mofo should restore an imperial throne, but the Bonapartes were always a bit nouveau for my liking:
http://en.wikipedia.org/wiki/Jean-Christophe_Napol%C3%A9on

Isn't royalty fun?