First Tundra, Suggestions Please!

I’m causally looking for a used Tundra and wondered if any folks can recommend better years and must have specs/features.

The only must I have is towing capacity as I will be hauling 2 draft horses/trailer (minimum 6.5-7K pounds).

Looking for later models, 2014-2021, just for better safety features.

Thanks in advance!

 

2020 and 2021 will have the most features, push button start, Apple carplay, but didn't add any additional safety features. 2019 and up lack the push button and Carplay and have no transmission cooler to boot. 2017 and up have the TSS and larger fuel tank available and have the transmission cooler, but the 2018 is the tweener with the new refrigerant and the trans cooler both causing the AC to not function as efficiently. So I vote 2017 Tundra 5.7 DC SR5 with buckets and the 38 gallon tank.