which linux phone is the most promising?

I want to donate to a linux phone. I believe in linux and I want a linux phone. Maybe we can use one in very few years as a normal daily driver. It's getting closer and closer every month.

I want to donate that we get there sooner. But which project? I'm following postmarket but I'm not sure if they are the most promising. What's your stance on this? To which project would you give your money to accellerate it?

Edit: I don't want to buy a phone. I want to support the phone os devs. Sorry for the bad wording.