I'm also looking for this. I'll probably end up buying a Fairphone 6 when it comes out and use CalyxOS, but I have looked at alternatives.
These require using LineageOS:
The Asus Zenfone 8 is from 2021. It's 148 x 68.5 x 8.9 mm and has ok specs. I don't do anything demanding anyway.
The Sony Xperia 5 V is from 2023. It's 154 x 68 x 8.6 mm and has good specs, but is expensive.
The Samsung Galaxy S10e is from 2019. It's 142.2 x 69.9 x 7.9 mm and has below average specs (compared to modern phones). This is my favorite phone. I used this before my current one and miss it so much. I should have just changed the battery. I would pay lots of money for an S10e with a modern, more energy efficient processor and higher density battery.