I would strongly suggest that you look at a small hosting company for this requirement, and in fact any situation where the content being hosted could be misconstrued as copyright infringing. Find a company that is small enough to understand each customer as an individual, talk to them about potential issues that may arise, and above all make sure they are aware of the situation.
Copyright holders tend to send DCMA notices (or similar) in the first instance of any content they suspect is infringing without much in depth investigation. It's only once they receive a response that they will spend any time working out whether you have actually done anything wrong.
In addition, most large hosts will simply pull the plug on your server on receipt of a complaint and only investigate once you complain. Your service could be down for days on end whilst you convince their tech support that you are acting correctly.
On the other hand, a smaller host is likely to work with you to resolve the problem especially if you make them aware in advance of the problems they may face. You will pay a little more of course, but what think about what cost you would incur for a lengthy host-inflicted downtime period not to mention the cost of your time sorting the problem out.
You're best bet is checking out adult hosting providers. They're use to dealing with sites / problems that other hosts don't want to deal with. Check out some of the larger adult forums online and search for hosting. That should give you a nice list of the hosts which 'look the other way' and just want their monthly payment.