For me these tick all those boxes.
I found these on the net which are available in several colours so had to buy the lot...greedy i know BUT there were too many to choose from.
Great trim around the leg
Super soft elastic waistband
Low cut briefs
Feel soft cotton
The ultimate Funderwear
Bag yourself a pair or two they are worth it. They dont just look fun they are designed to lift and support your junk.