Yes I would recommend a volitan, volitans are a better choice for a larger community tank. Dwarf lions can be difficult to keep on a dead diet and more challenging to feed, especially in a larger community tank. If you were to choose a dwarf, I would suggest an observation tank, not only to assure their health, but to establish a strong feeding routine. Volitans are more agreeable, more resilient, and quicker and easier to establish. The only threat a volitan would present is if you introduced a fish too small, even a full grown volitan would not threaten an appropriate sized fish for a tank your size.
EDIT: Dwarf lions almost always come in needing to eat live food, at least initially, and can prove difficult to eat the proper dead foods for long term success. They also come in with internal parasites frequently and if you are not doing a qt, will spread to your display because tangs will graze on their poo. To a lesser extent can also have flukes. While I still suggest a qt for a volitan, they are overall more resilient in all regard.