On paper I should love Authelia, I’m a sucker for y’all configured services, I can write a couple of files on my Ansible and boom, everything works… However I never had much luck setting Authelia up, Authentik on the other hand was very painless (albeit) manual (via UI) configuration. I don’t do anything crazy, so any of them would work for me though, I just failed on setting Authelia and tried Authentik and had had no reason to change.
I used Lychee, I haven’t seen it mentioned here and it is very good.