I suppose if it’s not a Pixel device, I’d say LineageOS.

/e/OS is just LineageOS with their own customization and integration.

There’s nothing really ground breaking about “degoogling” on /e/OS.

There’s this “tracker blocking” feature they provide but you’ll achieve the very same with any DNS Filter. And I think in /e/OS case you can’t customize the block lists.

They also provide an app store which integrates F-droid and Play Store together, you can just use Aurora + F-Droid on LineageOS.

Not sure if it’s really worth it, I tried here on my phone and I didn’t see anything interesting and different from what you’d achieve with other custom ROMs.

Maybe their support will be better since they compromise on maintaining the OS and fixing issues.

eOS to lineageOS is like Ubuntu to Debian; a more newb-oriented solution with some stuff preinstalled but with less choices; e.g. you can’t switch out the iOS-like launcher. if you know your way around, you’re wasting your time with eOS. but if it’s for a less technically adept user, you might be doing them a favor with eOS. the murena suite can be opted out of.

I’ve come across an article recently that mentions both (and others), it might interest you:

https://blog.gridranger.dev/mobile-oses-featuring-fairphone-5/

Opinions don’t matter. Just check how updated they are. This impacts security and thus privacy.