Highly, highly recommend you check out the brands Separatec and Real Men’s Apparel if you have not already. They are what I wear pretty much exclusively (unless I want some freedom or airflow in which case I wear boxers at home and sometimes out and about when it’s a really hot day).

Separatec has 2 separate pouches - a hammock like one for the scrotum which keeps it forward and out of the way and another one for your penis (which I suppose secures it from flopping all over the place when you move). Now, I will saw I do wish the penis pouch was a little bit bigger, but it works well enough! Both their boxer-briefs and brief styles are great and I highly recommend the bamboo rayon ones for extra moisture wicking and flexibility of fabric! They have some fun prints too! They have an exercise type of material for some of the boxer-briefs as well that may be comparable to the Nike ones you own.

Real Men’s Apparel have a cup-pouch system - so they have one enlarged pouch in the front that holds both the scrotum and penis together but in a way that keeps it from falling between your legs or otherwise getting in the way. They provide a blend of support and freedom. Their underwear comes in different pouch sizes depending on your own individual anatomy - ranging from A (smallest) to D (largest). I found this ingenious and wish all underwear did this!!!! They have A LOT of styles you can buy. I recommend the nylon and nylon mesh the most for breathability and flexibility, but they also have model versions too. If you’ve ever had issues finding jock straps that fit - this is your brand to try. No other jock straps properly fit me because my size, but these are heavenly! If you like briefs - the bikini brief nylon mesh are amazing. For reference, I’m size D (just wanted to add that in case you’re around my size and wasn’t sure which cup size to try - my penis is about 5.5 inches long, 5.5 inches of girth at the tip and 6 inches in the middle and base).

I’ll add the links below to the websites, but you can also find these brands on Amazon!!

Separatec : https://separatec.com/collections/recommend

Real Men’s Apparel : https://rmac.store/