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

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Me too. My concern is that we will be tethered to Google once they switch us. I am looking for custom high/low HR alerts and ideally workout HR-zone alerts, during exercise and my Luxe doesn’t offer that. Garmin does but don’t want a bulky watch. Hmmm.
I bought a fitbit luxe off backmarket for less than $50 this year. It's simple, but it tracks swims.
My seventh Fitbit died last week (from Luxe to Versa to Charge 5 and 6, this was my second in-warranty replacement), white line on the screen to no screen at all within 24 hours. So with some Target credit I decided to go with a Garmin Instinct for $200. The GPS is much, much more accurate (even when not paired with my phone), the app tracks a lot more information than the Fitbit app did and takes up a third of the space on my phone. I miss the constant step updates; the Garmin just updates every minute. That's about the only drawback.
My wife also has the Luxe, mainly because she has small wrists. I've tried to talk her into replacing it with a Lily, but no luck so far. I have a Forerunner 955 and I put it on her once, it was almost comically huge :) It's good to hear someone made the transition and didn't regret it!
I hate my Samsung Galaxy smart watch. Mine wouldn’t update properly (software connecting issue) and the battery would drain fast. For context, I’ve had 2-3 fitbits & 1 Garmin. Garmin is the most consistent and longest battery life. Fitbit finally died because it stopped updating the software or bugging (had the luxe for years til last year).
My Fitbit luxe is very small.
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

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Garmin - Forerunner 255 Series

Ranked #1
Oura - Oura Ring Series