Virtually any plant can be a bonsai, with root pruning, confinement to smaller pots, restriction of fertilizer, and pruning of the foliage. Citrus trees would work well, but they produce thorns, which must be clipped off. Myers lemon trees produce very few thorns and do well in containers. These are high light plants.
Miracle fruit is a shadier growing, small shrub that would do very well with a chameleon. Ficus, aralia, tropical fruits, like mango and starfruit....your options are limited by budget, commitment to the plant's needs, and your lighting.