I'm finding that the Daily Mixes, found near the Discover Weekly playlist in the "Made for <user>" part of the app, do a good job of this, and will also include

I'm finding that the Daily Mixes, found near the Discover Weekly playlist in the "Made for <user>" part of the app, do a good job of this, and will also include similar music not in your library for discovery In fact, my personal experience is that Daily Mixes do a better job showing me new music than Discover Weekly does