Two translations for meek in my small German/English dictionary.
Duckmäuser: moral coward. Hmmm, as meek as a church(Maus)mouse? Definitely a pejorative.
sanftmütig: Which uses two words that could be translated separately; sanft (gentle) + mutig (courageous)= meek.
Somehow, I don't think it's the moral cowards that will be blessed.