If you care about privacy and have about $100 + 4 hours you can get a Galaxy S5 running LineageOs without GApps (use F-Droid store) .

Almost completely OSS besides a few manufacturer blobs you can't really work around.

I have a "normal" Android phone I use for work but my S5 is my daily driver for everything else. Works great, hardest part is setting up stuff to replace FAANG.

I use ProtonMail, Open Camera, Matrix/Riot for family chat.

Haven't found a good calendar yet but overall way more usable than a dumbphone and privacy concious

There's some "nicer" options like One plus for LineageOs but you will probably find the S5 fairly snappy since its based on Android 8.0 . IMO the last few versions of Android make a much larger performance difference than a few CPU generations