I'm not sure about in the parks, but I think that the Rainforest Cafe stays open later because it has an outside entrance as well. Remember that there are some excellent choices at the near by Animal Kingdom Lodge as well!!!
Rainforest is the only TS at the park. If you want TS, I would suggest going over to AKL and trying either Boma or Jiko. If you want to eat in the park, AK has 2 of the best CS that Disney has to offer.