The most recent Blue Angels accident and resulting deaths (that come to mind immediately) were in 1999 in Georgia before a weekend air show. Lt. Cmdr. Kieron O'Connor and Flight Officer Lt. Kevin Colling were killed when their plane (#7) went down and I believe there was another in 1990. As far as crashes during the actual Air Shows, two Angels collided in Niagara Falls in 1985 killing one pilot and there were two others dating back to 1952 and 1946.
Thanks for the information!