Maybe on the surface, but not really when you go into details.
The Shadows don't try to wipe out any species. They want to stir up conflicts among to younger races to help them evolve faster (Chaos through warface, evolution through bloodshed, perfection through victory), believing that the survivors of such wars are smarter, stronger and better. Only in chaos can growth occur, order is stagnation. Of course some species get wiped out, but for them that is regrettable but accepteble collateral damage. "Of course some are lost, but you can't let that get in the way of the goal" to quote a kind of ambassador of the shadows in the final episode of season 3.
The Shivans on the other hand wiped out the ancients without giving them a chance to "learn their lessen". Wether the Humans and Vasudans survival or the ancients annihilation is the exception from their usual way is anyones guess.
Unlike the Vishnans the Vorlons don't much care about the enlightenment of the younger ones, or about preserving anything. They just want to teach absolute order and discipline to the younger races, because they beliefe this is the only way for them to evolve, up to the point that, once the rules of engagment are broken, they wipe out whole planets that were "infected" with the Shadows' philosophy. They even were willing to destroy a planet which was the home of a primitive, albeit numerous (several millions, I forgot the exact number), species that wasn't even aware of the base the Shadows build on their world.
Lorien and his people "meditated between order and chaos" as the technomage trilogy put it. They believe and growth can only occur were order and chaos are in balance. That's why they left both the Shadows and the Vorlons behind as guardians.
We have no information on the Brahmans, except that they existed.... and even that isn't fully reliable information, considering the circumstance of how the 14th got privy to that info.