I’ve found that though many people use various seed projects, the easiest & most consistent starting point for an angular app (or any javascript web app) is Yeoman.
This app is a scaffolding tool that allows you to specify generators which will build the up the kernel of your application, complete with whatever libraries you desire (via bower) and a working grunt build file (most generators come stock with a build task, server task for live editing, and testing task)
Though an app like this is necessarily opinionated, the scaffolding it produces is still very generic.
example:
mkdir my-app
cd my-app
npm install generator-angular
npm install generator-karma
yo angular