Yes, there are quite a few documented "scary guy" stories out there apart from Michael Platt of the Dade County shootout, who did not go down until he was shot for the 12th time at point blank range.
One Richard E. Blackburn is serving a life sentence for killing South Carolina State Trooper Mark Coates. Mark Coates shot Blackburn 5 times center mass at near point blank range with his 357 Magnum revolver. I have heard conflicting reports as to whether his revolver was loaded with 357 Magnum or 38 Special +P rounds. Blackburn not only survived but remained non-incapacitated enough to shoot Trooper Coates with a .22 caliber handgun that hit Coates in the armpit area missing his vest and entering his aorta. You can watch a dashcam video of the shooting on youtube that shows exactly how long it took Coates to go down after being shot in the aorta with a .22. (Spoiler alert: it was not absolutely immediate but it didn't take long). I remember hearing an interview with Blackburn in which he said the gunshot wounds felt like little beestings.
Bob Stasch is a Chicago cop who survived 14 separate gunfights. Massad Ayoob did a long interview with him which can be found on youtube. The interview is worth listening to if you want to hear from someone with real gunfighting experience:
http://www.youtube.com/watch?v=Yd3v_fssabI
In that interview, Stasch describes in detail his first gunfight with a 23 year old Cuban immigrant drug dealer who came at Stasch's partner with a butcher knife. The partner shot the Cuban 6 times at point blank range in the chest with his .45 Long Colt revolver. The Cuban continued to lunge and grapple with Stasch's partner who managed to get on top of him, draw his backup J frame revolver loaded with 158 grain 38 Special +P, and fire 5 shots into the center of the assailant's back. The Cuban assailant continued the fight and managed to get on top of Stasch's partner when Stasch entered the building lobby where the fight was taking place.
Stasch started taking shots from about 15 feet, closing as he fired and shot the guy twice in the upper torso with his S&W Model 29 loaded with 240 grain .44 Magnums. This did not seem to faze him. Stasch concluded the guy must be wearing body armor (he wasn't) and started going for pelvic shots. He hit low, once in the guy's thigh, and his fourth shot took out one of his kneecaps which finally ended the fight after the perp had been shot 15 times at close range. The guy had a relatively low blood alcohol level of .05, and no drugs in his system on toxicology screen. He lived for 10 days after the fight.
I have seen a fair number of gunshot wounds. Some people who were shot described it as the worst pain they had ever experienced. Others didn't even realize they had been shot. I remember one individual brought into the Trauma Unit at Cook County Hospital by the Chicago Police after they shot him. The guy had been waving a pistol around in a threatening manner. At the time, I was a medical student and back then (late 1970s) the Chicago Police were still by and large carrying 357 Magnum revolvers. The guy was hopped up on PCPs, manic, and talking at 60 miles a second. The bullet had hit him in the dominant elbow, largely blew away the bones there, and immediately ended the threat. The individual was completely unaware that he had been shot, or appeared so. When someone pointed out that his arm was dangling loosely and he was bleeding all over the floor, he glanced at his elbow with as little interest as if they had pointed out to him a boring picture on the wall, and carried right on.