shavefan
I’m not a fan
Another vote for Saxx. Their Ultra boxer brief has been my go-to for years.
Most of my underwear is from Uniqlo, and I have a few Jockey boxers too. But the nicest undershirts I have ever had are the Schiesser "American" t-shirts that I found a while back on Amazon. Also, I still have a few really good Boss undershirts that I scored at a Boss factory store at least 10 years ago for next to nothing.