That leaves a lot of marvelous territory to choose from! This will probably turn into a long list, so I'll just suggest two that jump to mind:
#4, Christ lag in Todesbanden. The opening chorus is a thriller.
#29, Wir danken dir, Gott, wir danken dir. Not only the delightful (and famous) Sinfonia, but the chorus that follows, which also turns up in the Mass in B Minor.
More nominees will be forthcoming, I'm sure...