The Maschine Drum Synth.
It looks like nothing. It can do everything. When I first really took a deeper look into it, I felt stupid for ever having bought additional drum sounds. In fact, many of the dope drums in all of the hyped expansions: Maschine Drum Synth with a few FX thrown on top.
And the fact that it looks like nothing and can be twisted from rather realistic over circuit bent into electronic classics with just a few knobs is also really ingenious, because there is so much going on under the hood.
If you look for Maschine Drum Synth on YouTube you can find a talk with the two main developers which is worth the watch