Garmin
Forerunner 255 Series
Long battery; but wrist HR tracking is inconsistent.

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Garmin Forerunner 935 was going strong and was about to hit the 5 year point... until I did the stupid thing of freediving with it.
Forerunner 935, had to wear my friends enduro for my one 100 miler though but it just about sees me through 100k
Fenix 8 47mm Sapphire. I've had a range of Garmins (Forerunner range: 35, 235, 935, 945, 955) but the 970 didn't appeal to me (accent colour on side and domed glass) so I got my first Fenix and first AMOLED watch (solar was thicker than my 955 which was already a bit thick under clothing). Love the look of the Fenix a lot more, plus better battery life
My 2019 Garmin Forerunner 935 is still going strong.
Ahhh I miss my forerunner 935 with its 2 week battery life, those were the days, this ultra 2 is not hateful though. Garmin does make a decent outdoor activity watch though.
I’ve got the Race S, really like it! It needs charging more than my old Garmin 935 did, but I much prefer the simpler UI on the Suunto. The app is much better too but the Garmin did have some features I miss sometimes; card payments and music for example, but I’m happy with the much cheaper and smaller Suunto.
Garmin
Forerunner 255 Series
Long battery; but wrist HR tracking is inconsistent.

Garmin
Forerunner 955 Series
Best value, clear MIP screen; limited smartwatch features.

Garmin
Fenix 7 Series
Durable, multi-week battery, flashlight; high price, buggy software.
Garmin
Instinct 2 Series
Rugged, solar multi-week battery; bulky, small screen readability issues.

Garmin
Enduro 3
Multi-week solar battery, lightweight; but bulky form factor.

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Oura - Oura Ring Series

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Apple - Ultra Series

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Garmin - Enduro 3

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Garmin - Fenix 7 Series

Ranked #1
Garmin - Forerunner 255 Series

Ranked #1
Oura - Oura Ring Series