Can I filter members by "No Subscription" or "No Level"?

I imported a large batch of new users all at once. I want to add them to a Level. But I can’t filter my Members to only show those with “No level” (aka the newly-added ones). I must Select All, and then manually weed out my existing Subscribers (who are at a different Level). Is there some way to filter only the users with No Level assigned?