People often forget now that The X-Files achieved Lost-esque popularity during its heyday, if not surpassed it. Although slightly scorned by the mainstream these days for being too genre for its own good, we still love it.
Quite why Babylon 5 never reached stratospheric levels of popularity is beyond us. It’s better than Deep Space Nine on several levels, it has a range of characters and a grittiness similar to BSG years before the remake aired. It’s classic.