Mods... If this is the wrong forum for this question, please move it to the appropriate section. I couldn't find a forum good to discuss multiple different species.

What would be a good arboreal species that would work in a 4x2x2 minimum enclosure, but possibly as tall as 4' (4' enclosure height, that is). The larger the species for this sized enclosure, the better, but I am flexible.

Any recommendations?

I already have a Ball Python, Mexican Black Kingsnake, Boa Imperator, and a Woman Python... all females.