Another inspiration from area of note-taking apps:
TheBrain with it’s hierarchical-local-graph and great outline-like-layout rooted in any node, unfoldable also upwards towards multiple parents.
TheBrain also displays icons (image previews) and titles in the graph instead of just filenames as requested in Display customizable representation strings/icons instead of filename-only
Additional layouts (e.g. hierarchical or 3D) are already implemented in Neo4j Graph View Plugin. Perhaps that fulfills this feature request ?