Honestly Pixel should be the only android you consider as its the only phone that doesn't come loaded with trash spyware (outside of niche phones like Fairphone)
Google might have some spyware (e.g. play store). But it's not trash. I trust them to not get hacked (definitely more than Samsung or Huawei)
They also afaik have better support for replacing the stock firmware (although I've never done that)
For those inclined for more privacy, Pixels are one of the only phones that allow you to install de-googled Custom Roms without compromising the Android security model.
I know many people who use Fairphones and they've never been disappointed. You can still find the spare parts, remove the battery, and setup the OS you want. Be careful though the "setup your own OS" part may not be supported for a few months after a new model comes out so be sure to check the compatibility list on lineageos.org.
Unfortunately to my knowledge all other vendors are just scammers who will sell you half-functioning phone due to spyware bundled as part of the system (just try to remove Google Play Services :)) where you can't unlock the bootloader to setup your own system.
Second, because this is primarily due to economies of scale and predatory behavior from economic giants: if consumer/environmental protections don't outlaw ethical abuses from the few corporations who capture the market (see also planned obsolescence [1]), the "ethical" alternatives are always going to be more expensive and less attractive.
Third, because there are simple ways to have a strong impact immediately. For example, by forcing all hardware manufacturers to publish the entirety of their data sheets / schematics / research, you'd find a much better OS support for older devices (and new devices too), which would bring a practical incentive (cost) to use older hardware which currently has to be thrown away (for example if the OS does not support newer TLS standards [2]).
The situation is only bad because we let it be. Going with big tech for short-sighted, individualized gains, fails to address the elephant in the room that we as humanity can do so much better and everyone would be better off.
[0] https://en.wikipedia.org/wiki/Wirth%27s_law
[1] https://en.wikipedia.org/wiki/Planned_obsolescence
[2] https://f-droid.org/pt/2020/05/29/android-updates-and-tls-co...
https://www.motorola.com/us/smartphones?ds_rl=1242193&ds_rl=...