If "rich" is meant as quantity or choice options...no...it isn't...Is German food really rich? I honestly do not know.
Of course, as an American, my opinions on what would qualify a food as being "rich" ate probably skewed!
If "rich" is meant as quality, taste and even history...yes...it is...
It is rich like all the European food...even if no one can beat Italy for quantity (regional dishes), quality, taste and history...