Mathesar ( https://news.ycombinator.com/item?id=34999774 ) was the last one I tried out but it couldn't support more than 250k rows without crashing and required foreign keys in order to infer relationships. Otherwise it's exactly what I want. An Excel/Airtable interface around a raw database connection.
How does Outerbase compare?
Edit:
Mistypes
To be entirely candid and honest, returning a lot of rows presents problems on our end as well at the moment. It's something we are actively working on improving for large data sets to create the best user experience without having to concern yourself about what you're returning.
For our EZQL (natural language to SQL) you don't necessarily need to have foreign keys to infer relationships between tables. We try to infer those relationships for you.
Also, relationships without foreign keys is on our roadmap: https://github.com/centerofci/mathesar/discussions/2276