For a 1911 type safety, the best is probably that used on the Star and Argentine Ballester-Molina. The safety cams the hammer back off the sear by imposing a very solid block in front of it so it cannot fall. If the hammer is struck, it cannot damage the sear, where with the sear blocking system used in the 1911 the hammer rests on the sear and a blow to the hammer will damage the sear and hammer.
Jim
Jim