Amber,
Is your greenhouse heated? What are the min. temps encountered inside? (these I would recommend growing in containers if you have temps above 32 degrees).
Here are some recommendations; Dragon Fruit, Jaboticaba, Mango, Poha berry (Physalis peruviana), Passiflora edulis (If you have some nice trellis), Guava, Eugenia luschnathiana, Achachairu (Garcinia sp.), Papaya.
Number one pick would have to be Dragon Fruit though for taste, appearance, and yield. In a 10 gal container with a decent trellis setup around it should produce fruit after 2 years under a greenhouse.
Of course there is hundreds of great figs to grow in containers! :). I just like growing the exotic and tasty hard to find fruits, since you have a greenhouse you have special conditions to grow a lot of these subtropical/tropical fruits.