I've never tried it in angular, but it might be import platformClient from 'purecloud-platform-client-v2'; as demonstrated here in a react test app. There's some general information about the setup of that app in the readme in https://github.com/MyPureCloud/platform-client-sdk-javascript-beta.
Thanks for the reply @tim.smith , it is not working as 'purecloud-platform-client-v2' does not have a default export. That's why I'm importing it using * as platformClient.
I think angular is defaulting to the CJS module from the package. My guess is that you'll need to configure angular and webpack to use the jsnext:main entry point in the package as was done in the react example I linked. That should allow it to use the raw ES6 classes instead of the transpiled module. I don't know how to accomplish that in angular though.