I don’t believe there is a wink brand thermostat, and if there is, it’s likely a rebranded Device like the iris was.
I think the most popular thermostats in the community are ecobee, nest, various Honeywell models, and one of the CT 100 series zwave thermostats.
Of these, nest doesn’t have an official SmartThings integration because nest doesn’t like it when developers get too much control of their devices. (There is an unofficial integration which is popular.)
Personally, we have an ecobee lite and like it very much. It works well with HomeKit, Alexa, and smartthings, and we did get a $50 rebate from our utility company when we bought it.
We particularly liked their second sensor option because we have one of three bedrooms in the house which is always colder than the others and that helped us balance things a lot.
But they are all pretty good choices, just depends on the specific features and budget you have.