Microsoft might have ups and downs with Windows, but they redeem their glory with their IaaS. Ranging from Linux and Windows VM options, to large region coverage and the like, it's no doubt why industries like GE Electronics trust them.
DigitalOcean is the most cost-effective, industry-trusted, developer-centric hosting service you can find. Ranging from Programmatic APIs, to a nifty and clean interface, along with a fast provisioning of Cloud instances, it's no mistake this service is the most picked for being cost-effective.
IBM Cloud is probably the most passive, generous Pay-as-you-go for a IaaS. Not only you get to mess with VPSes and Baremetal, you can also trial out their services, in the convenience of one upfront service.