IMHO, Digitalocean beats everyone. You can create a LAMP stack and get started in seconds.
But then all cloud providers provide PaaS for Php+MySQL. Azure has webapps, AWS has beanstalk, Google has AppEngine.
I would not say that DO beats everyone since DO is pretty expensive & limited in its functions. Also DO is not very a PaaS. Your suggestions are all Cloud Providers except maybe Beanstalk.