Wat can be housed w/ a green anole which i keep in a 20 gallon tall, i was thinking a crestie but idk?!!!?

also tell me if i need to upgrade my tank size for him. and don't worry because i am a very experienced reptile owner i have a 4 year old beardie named rex a ball python named felix a milksnake named puzzle and a chinese water dragon named rain, a leo gecko named luna and a white dumpy tree frog named Elvis.