With all frogs you need to keep temps and humidity spot on, there are not many frogs other then pac that can live happily in a tank of that size.

Based your criteria, I suggest e. AgricoLae, bayeri chamelion gecko. Absolutely adorable, you can handle, actually they will be hugging you, they are little tree/branch/finger huggers. Food - any complete fruit based diet, Repashy, pangea with occasional cricket. Room temp, can handle wide spread of temps.
downside though, they are on expensive side, and you can't keep two boys together.