Aurelia should be taken into account. It is powerful unobtrusive framework created by Durandal. Written with ES 2016. Integrates with Web Components. It focuses on web standards unlike Angular.
The list of features: Two-Way Databinding, Routing & UI Composition, Broad Language Support (ES5, ES 2015, ES 2016 and TypeScript).
It is also testable with powerful Dependency Injection Container. It is made easy for you to create highly cohesive, yet minimally coupled code, making unit testing a snap.