It really depends on what you want from your phone and what matters to you.

I recently got a refurbished OnePlus 9 and put lineage on it. I would have gone with a pixel and graphene, but pixels with more storage are hard to come by and expensive.

Find which roms are available for your phone and choose from there, or if you want to change the Asus phone, look at your target specs and which phone ROM combination you can find

Stuck on a relatively new Galaxy rn, but if I could install a custom ROM, it would be GNOME shell mobile

I am very happy with my moto g42 and Calix OS. The phone is reasonably priced (around 120.- euros).

Only downside is you have to register online to get full root access and I also had to wait like three days till everything unlocked. Otherwise I found the process very easy even for a caveman like me.

CrDroid on Poco F3, it just works and it's on latest Android version.

I use proprietary AOSP because I require online banking :(

i have calyx on a pixel 7a since it's easy to use

Stock AOSP shipped on Pixel.

Would like to know too! I use a proprietary OS for now and want to jump ship with my next phone.

I use CRDroid /CRAndroid, because it was the only de-Googled ROM for my specific model of phone (S20 FE Exynos), also (I think) it's a fork of LineageOS.