I agree in that 'it' is better than 'they' because the latter is plural and, even if you have more than one gender (or none), you are still a single being. I think 'e would be a good alternative as it could be used for anybody (and those who speak Estuary English do this for males already).Instead of calling him they or them can’t we just call him an it?
e.g. Sam Smith was photographed laying on the floor with some string tied around its gut. It looked like it was impersonating rolled pork.