Minio used to be de facto here, but they did a bait and switch recently and removed the UI from the free version. Garage is probably closest to best in class for open source on prem.
I'm using it in my lab, along with an older instance of minio, and both are excellent choices I think. (I'm running both as HA jobs within a Hashicorp Nomad cluster, which complicates / eases various things.)
I had a vague memory of minio losing some favour a while back because they switched their underlying storage from basic object : normal file mapping to something more complex. A lot of home users, and I guess developers, liked the ability to navigate their S3-esque buckets via normal linux file system tooling.
https://github.com/minio/object-browser?tab=readme-ov-file