Recoll is excellent. It was a game changer for me once I finally set it up on a NAS at home with a web interface accesible by port forwarding over ssh. Though the web interface requires some tiny tweaks to be mobile responsive.

+ It searches within compressed file types recursively.

+ Searches damn near everything

+ The huge number of way to interact with it - gui, python, command-line, web interface - combined with extensive if kinda weird query language make it clear its been refined for a long time.

+ Windows GUI

- Pain in the ass to make work right on windows, and the indexing on windows seems to be way longer for some reason.