For Contacts and Clock, use YOU apps. I don't think anything can replace the Gallery, I'll continue using the current version for as long as there's a new community-maintained fork. It's quite stable really, doesn't really need changing this very moment.

For the gallery I'm using Aves, and for the file manager Amaze.

For the dialer, contacts and clock I just use the stock apps from LinageOS.

For editing pictures, try out Pocket Paint (F-Droid). Feature rich and surprisingly good UX for a mobile editor app.

Not sure how it is for editing but I like Aves as a gallery app.

The hardest one for me to replace with be the file manager. I had already tried Amaze and Material and didn't like either before settling on Simple. sigh

To be fair something like the dialer or the gallery or the notes, you can just sticky the current version you have. It's unlikely to ever see major / important changes, I mean all the dialer has to do is to dial numbers, right=