Unfortunately, Apex has buried the venerable Allen brand.
I’ve always been fond of Bondhus hex wrenches, though sad that they discontinued the short ball-end sets before I picked up a set of metric ones. I carry a set of the short Imperials pretty much everywhere:
(The metric set in the above photo has been replaced w/ a Bondhus holder and a Wiha subset from a larger Wiha set in my frequently used tool roll)
Another well-respected U.S. brand is Elklind (my two main sets, sold under the Popular Mechanics brand are from them) which last I checked made the hex keys for Snap-On. If you want discrete bits for a 1/4" driver, the Bondhus ones are quite nice, and Chapman Manufacturing does great sets.
Wiha are quite good, and Wera is well-respected (though some claim quality on the latter has dropped off since production was moved to eastern Europe).
Thorp is well-regarded in the RC vehicle community, and most of the upper-echelon bike tool brands (Park, et. al) are good, and I’ve always had good luck with the better Japanese brands such as Beta (see the Niwa tools in the above photo).
PB Swiss are among the best brands easily available, and I’m very impressed by the bits in my Victorinox bike toolkit.
There’s an article on this here: https://toolguyd.com/ball-hex-key-set-recommendations-from-budget-to-best/ which reprises much of the above.