I like the idea of tree curation. People view the branch of their interest. Anyone can submit anything to any point but are unlikely to be noticed if they submit closer to the trunk. Curated lists submit their lists to curators closer to the trunk.

The furthest branches have the least volume (need filters to stop bulk submission to all levels, but still allow some multi submission). It allows curators to contribute in a small field. They then submit their preferred items to the next level up. If that curator likes it they send it further. A leaf level curator can bypass any curator above but with the same risk of being ignored if the higher level node receives too much volume.

You could even run fully AI branches where their picks would only make all the way up by convincing a human curator somewhere above them of the quality. If they don't do a good job they would just be ignored. People can listen to them direct if they are so inclined