If you have the money and you care about not buying or owning a Google product, and / or you care about repairability, get a FairPhone: you can install ~~GrapheneOS or~~ CalyxOS on them and they too support relocking the bootloader. It's not just Pixel phones.
Bonus: they have a SD card slot, unlike Pixel phones.
They're not the speediest or sleekest devices, but that's not where the interest lies with Fairphone cellphones: they're mostly designed for long life and easy maintenance, and they're made by a cool company I want to support personally. And they're not made by Google, so buying one won't support Google or the Pixel ecosystem in any way.