Indeed. Deus, Maegera, and Mirage are more widely known because they actually went and meddled with metahumanity on a significant scale. Alice, on the other hand, created Wonderland and was content to make Roxy's life a living hell for as long as possible. Hence, she wasn't well known to the outside world, and only a few steps up from an urban legend in runner circles. Just like how Morgan/Maegera was before the Shutdown, and the fight over the Network, when she 'came out' and started making major plays to counter Deus. In other words, the visibility of an AI is not the measure of the power of an AI.
As for other events creating e-ghosts, JackBNimble 'saved' and 'archived' a lot of people during the Crash, including Captain Chaos.