Another vote for Garmin instinct (2 solar in my case). Not E-ink but oldschool style black/white LCD. Full charge with nightly pulsox is just above 2 weeks, would be 3 if i turned off nightly pulsox. With solar, if you are active outside and have a sunny climate, you probably do not need to charge basically at all.

There is also the instinct crossover for the hybrid look. But first series instincts are supposedly hit or miss on the software. And trust me, the whole analogue watch thing is nice for looks, but really you will not look at it if you have a digital clock on the watch face.