Here's some help for you.
Canada, Singapore, Iceland, Norway, Denmark, Poland, UK, Finland, Belgium, Germany, Netherlands, France, Japan, Australia...
I could name more but you get the point.
Tariff rate, applied, simple mean, all products (%) - Country Ranking
>> list some countries with lower average tariffs than the USA <<
Singapore, Hong Kong, Iceland, Canada and Switzerland.
And higher than the USA?
Gabon, Chad, Benin, Grenada and Bahamas.