I count 32 papers in that list, of which Hemenway is primary author on exactly one, and he is a secondary author on six others. So when you say that list is "mostly" Hemenway, that is lie number, umm, I've lost track, I think you're in the triple digits by now.
I'm not sure why you're hung up on Hemenway, he's not really even the leading researcher in the area of guns and suicide. My guess is that he's the one the NRA teaches people to hate, so you guys end up believing that all the studies are by this one Harvard professor with an anti-gun vendetta. This is how myths circulate.
A researcher doesn't have to agree with me to not accept Hemenway's studies. They only have to be agnostic and not take Hemenway seriously let alone view it as a definitive work.
Again, can you name any such researcher? Can you quote any expert on suicide that doesn't take Hemenway, or the Harvard School of Public Health, or any of those other studies seriously?
As for your "point", what you miss is the evidence linking gun availability and suicide goes far beyond the simple observation that suicide rates are higher in states with more guns and laxer gun laws. If you would spend more time reading the literature and less time reading gun blogs you would know that, and then maybe you'd be able to make a point that was actually on-topic.