I'm assuming you're looking mostly for bars. Bonnat are quite good, though more expensive than Cluizel:
http://www.bonnat-chocolatier.com/
They used to have them at Hannah's, but no longer. You can always order online from
http://www.worldwidechocolate.com or
http://www.chocosphere.com.
Hannah's does carry a small selection of Pralus bars which are excellent.
Those would be my two favorite widely available French chocolatiers.
I am, however, more a fan of Italian chocolates. As a general rule, though particulars may vary, there seems to be more retraint with sweetness and less emphasis on creaminess in texture. These impressions aren't easily captured in the percentage cacao, a number which as taken on a Robert Parker-esque significance. Anyway, I highly recommend you seek out Amadei, Domori, Guido Gobino, and Venchi chocolates. For a truly unique experience, seek out Domori's 100% bars or their "Kashaya" whole roasted cacao beans. The Apurimac is a rather wild experience, with a pronounced sourness that's almost tamarind-like and floral. These are available at the sites listed above.
rien