I haven't yet run across an adjustable wrench that was worth a shit. Even old (notionally decent?) Crescent ones. The jaws invariably splay when you apply force, even if you're using them correctly. I've come to the conclusion that it's just intrinsic to having a moving jaw that moves easily enough to be useful. At this point, if I expect to need the wrench ever again (or need to reuse the fastener), I'll just buy a…
The best quality traditional style adjustable wrenches I am aware of are made by Bahco. They are made with tighter tolerances than typical Home Depot grade stuff, which reduces slipping and damage caused by jaw movement. https://www.bahco.com/int_en/products/wrenches/adjustable-wr... However, I prefer the Knipex pliers wrenches mentioned by other commenters. They are also useful for many other gripping, pressing and…
For other options, there is a youtube video comparing different adjustable wrenches for strength (https://www.youtube.com/watch?v=cyOd05PUix4). The Bahco did indeed do well, although it was not the very best the tested.