Looking for gecko ideas

I am in the process of constructing a large palludarium, and am looking for gecko suggestions.
The palludarium will be eight feet by four feet, by six feet high. It will have a large water area, and lots of plants, branches, etc. I am still working through what species I want- definitely mink frogs and gray treefrogs. It will be a community set-up. I can't imagine doing this without geckos. However, I am not sure what I want.
I can't have anything tiny, or the mink frogs may eat them. I can't have anything too large, or they may eat or injure the treefrogs. They also must be able to thrive in a humid, warm but not hot, environment.
What gecko species would you consider if you were in this situation?