my list is the same as yours (minus android auto) and i’ve been wondering the same thing so i have decided to offload the capabilities that i need on my current phone while tethering it to my new lineage or graphene phone.
it seems that graphene is more secure, but i hate google with a fiery passion so i refuse to support them in any way including supporting their second hand market. i’ve also NEVER had good luck buying second hand personal electronics so it would be foolish for me to do it again. also: my goal is to de-google and my privacy threat is the local police and ice; not the cia, nsa, the rest of homeland security or mossad; so that makes both graphene and lineage work for me.
on the other hand: lineage supports more devices, but i looked the other day at the most recently released phone models and pixels top that list too; so it seems that going w a pixel opens to door to letting you use both graphene and lineage if you decide that you like one more than the other.
i was going to purchase an e/os device from murena up until a few weeks ago until its ceo showed his stripes in public and made he clear that he’s thinks that only criminals was this sort of security.
i used to do this with kodi on a tiny linux desktop connected to my tv and used vnc on my phone as a remote control for it.