For QC this is a pretty solid tester (run on L or other compatible runtime) - focused on performance as it pushes multiple edges.

https://github.com/l-labs/master-benchmark

Which can also be run with minimal modifications on ngn and others.

For database the h2o.ai for duckDB really is a solid hard bench IMHO:

https://github.com/l-labs/db-benchmark/tree/main/l