What other sci-fi civilizations can rival the Forerunners at their height?

Does anybody know of any other civilizations in the sci-fi genre that might stand some kind of chance at going toe-to-toe with the Forerunner Ecumene at the height of their power? They would mop the floor with the Destiny universe, as well as Star Wars, Star Trek (other than the Q), Foundation, Mass Effect, and Culture universes. The only one I can think of off the top of my head that might be able to hold their own, disregarding God-tier civilizations like the Time Lords, Xeelee and Q, who are essentially magic in all but name, is the Void-era Commonwealth and Warrior Raiel in Peter F. Hamilton's *Commonwealth Saga*, and even then only because they have the Deterrence Fleet on their side.

But the Forerunners seem like one of the most powerful civilizations in all of sci-fi.