1. Controversial but non-violent political speech?
2. Legal adult content
3. Content critical of some big business
Hosts that actively protect the privacy of clients from frivolous complaints will be even better.
Bear in mind, what you're asking here, is for a company to put their own reputation and business on the line to protect you. If your content is not welcome in the mainstream, a company hosting you faces boycotts, protests, resignations, leaks, etc. Even amongst people who would agree with you, they probably wouldn't be willing to take their own business on protecting yours.