Bip and Stratos are the watchier lines, they also have more minimal Fitbit strap-style product that I forget the name of.
EDIT: Here's another new entry https://arstechnica.com/gadgets/2019/04/garmin-revamps-entir...
> Like most Garmin smartwatches, the Forerunner 45 and 45S track all-day activity and sleep, deliver smartphone alerts to your wrist, and are easy on the eyes thanks to an always-on, sunlight-friendly display. Even though the Forerunner 45 watches are the most affordable of the bunch, they still have a heart-rate monitor and built-in GPS, so users can make outdoor runs without the help of a smartphone.
> It can also connect to external sensors like a running dynamics pod and heart-rate chest straps to capture more running data while you train. The Forerunner 245 watches have the same one-week battery life as the Forerunner 45 watches do when in smartwatch mode, but they'll last up to 24 hours in GPS mode or six hours when using GPS and music playback simultaneously.
That looks really promising.
Its display is always on too, though the backlight isn't so if you need night-time tracking it won't meet your requirements but otherwise it will.
It isn't top-of-the-range either, or even a brand spanking new model at all (early 2016 release IIRC).
Things have stagnated a bit I'm sure, but mainly because we are hitting to plateaus: one caused by the limits of battery tech & what size/weight we are willing to carry, the other caused by there not being many features left to add, at least not that most users will be willing to pay extra for (or lose battery life in order to support).