My old Garmin Forerunning 45 is super customizable. It may not be the best thing out there but you have wild freedom in the display including a store of free models created by other Forerunner users.

Here you go: https://pine64.org/devices/pinetime/

Not apple watch! You CANNOT turn off the "smart stack" and it's really obnoxious there is no way to entirely mute or remove it.

I've customized all the settings as much as possible to have it not auto-turn on when you raise your arm, removed all the apps from the "smart stack," turned off "Auto-Launch Live Activities," turned off scroll crown to enable smart stack, and followed a bunch of other online tutorials on how to get rid of it and the damn thing still pops up ALL THE TIME. It's really obnoxious I will be in meetings and the stupid smart stack will self-launch and be buzzing me and distracting it's incredibly infuriating there is no way to remove it entirely.