A would vote a palm tree and there are many different types of palms that do well indoors. The variety would depend on how much sunlight and heat the space is given. Some palms can survive in very low light. A fiddle leaf fig tree is another option for low light. If the space has plenty of sunlight overhead then a Meyer lemon tree would be a fun novelty with the added bonus of edible lemons. Visit a local nursery that sells indoor plants to get a feel for the different shapes and sizes of indoor trees. I usually don't recommend the ficus tree as they can be temperamental and drop leaves at the slightest change in temperature or light. Keep growing, Marianne Binetti