Great modern, dark/electronic score by Jessica de Rooij (both films).
Jessica de Rooij is (surprise) also an actress!

Have not been able to find Rampage scores anywhere. Worth watching movies for score alone.

Refs:
Jessica de Rooij (http://jessicaderooij.com/music)
Je ? Wikipedia (http://de.wikipedia.org/wiki/Je)
Rampage: Capital Punishment - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Rampage:_Capital_Punishment)

Yes, still nothing,...