Having traveled the world while active duty military and as a contractor for Uncle Sugar after my retirement I have to say that my favorite chocolate found is Ghirardelli....
http://www.ghirardelli.com/
Stay safe TG !
I love chocolate, but if I eat enough to satisfy the craving, I'll have to put up with mild acne. Bummer. :-( Moderation just doesn't work with chocolate!
The best stuff I've had is an Icelandic 'cooking' chocolate which is unassumingly wrapped in dull white paper. It's very dark yet quite sweet, with an high cocoa butter content. I think they use it to make hot chocolate. I'd drop a square (it's divided in a grid similar to a Hershey bar) into my coffee, and it would dissolve in an instant. Good stuff right out of the package. Too good.
Being a 'cooking' chocolate, my stash would be stored with my other baking supplies. Conveniently, noone else in the house would find it. Heh.
Have you tried Scharffenberger? I much prefer it to Ghiradelli, and both are local to me. I think Scharffenberger is what chocolate was supposed to taste like before we processed and genericized the hell out of it.
While my experience is not remotely exhaustive, I actually find American chocolate to be a bit better than European, which seems to be primarily a function of ingredient quality.