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

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jo bhi lena inbuilt gps ho toh hi lena. Like galaxy watch 4, 5. amazfit bip. etc
Thirding the Fit 3. I have a Galaxy watch 5 as well but I got so sick of charging it every day. The battery on the Fit 3 lasts so long! I think I last charged it 2 weeks ago and use it everyday to track my stats.
I have a galaxy watch 5 and I gave it to my husband because the fit3's battery is like a week and I don't need any of the features lol
I bought a used Galaxy watch 5 golf edition for under $30. It has been great so far.
Apple Watch is good because you can do other things not just fitness related. I have se 3. But my god the battery dies so quick. Everyday I have to charge it. Sucks. Have to purchase multiple chargers soon, one for home and one for work. Prior I used a Samsung galaxy fit. Battery lasted days. Small slim profile watch which was nice and not delicate like the Apple Watch. But I have an iPhone and did not put time into experiencing if it can connect to other fitness apps. I had a Samsung before this phone so I had a Samsung galaxy watch 5. It was a good watch that tracked my fitness activity similar to apples watch where I could also do more than fitness related things. It was very nice and I really liked the round screen. Overall I think it comes down to what your fitness needs are and the mobile device you have.
I switched from a Galaxy Watch 5 to a Garmin Forerunner 965 and I'm many times more happy with the Garmin. But I care much more about the sports aspect of the watch and from the smartwatch aspect I didn't use much more than notifications, which garmin can do just as fine. But if you use the smartwatch features a lot I'm not sure if you'll be happy.
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

Ranked #1
Garmin - Fenix 7 Series

Ranked #1
Garmin - Forerunner 255 Series

Ranked #1
Oura - Oura Ring Series