Your
Fiddle Leaf Fig (Ficus lyrata) looks beautiful, happy and healthy to me and I wouldn't change a thing! I'm not really sure if I understand what you mean by the plant looking "bulky" at the bottom. Do you not care for the look of lower leaves and prefer bare stems, with only leaves at the top of the stems? I've seen Fiddle Leaf Figs planted in ground here in Florida with well formed trunks but many times when they are greenhouse or nursery grown for sale as houseplants, there can be two, three or even four separate stems rooting together in the same container to create a fuller look. As the stems get taller, lower leaves will sometimes naturally die and fall off, leaving bare stems. If your container has more than one plant, you could unpot it and gently separate the roots (that have more than likely entwined together) and repot each into separate containers but many, thin roots may be damaged when doing so. If the height of your Fig is an issue, the tops of the stems can be pruned; remove the lower leaves and pot them in small pots for additional plants.