GJ consensus seems to be Milwaukee, with honourable mention to Bremen as good value, and a grudging admission that Irwin is better than it was but not as good as it used to be.
I have a few Grip-Ons. I haven’t used them hard yet, so I haven’t noted any issues with the teeth. I grew up on Petersens, and tend to like their feel, still reach for them first, but the GripOns do still seem well made, offer a nice range of jaw shapes, and I quite like the epoxy coating.
Hardness doesn’t really matter for clamps. I don’t know where to get these in the US, but I really like the one I have with this jaw shape:
(There was also a thread about 3.peaks - a Japanese made plier. Not many GJ’ers have tried them, but they look interesting)