Remington R51 was on the right track, though Remington blew it; single large safety backstrap shielded by a hammer shroud, and a single action trigger. Combine that with a good trigger-covering holster (and a version of the gun that's made properly) and you have a very solid setup that is as fast to bring into action as anything. With a narrow and slick gun like the R51, it'd be comfortable, too.
BTW, the glock "safety" is not an operator safety (like a manual or grip safety). It is a drop safety; that's it. If it weren't there, the guns would fire if dropped muzzle up. Since it's positioned in a handy spot and technically does rely on user input, they sold it as an 'automatic' manual safety. It's no different from the trigger-operated internal firing pin block safeties in many other designs in function, but it is one of very few designs that rely on that feature alone to activate the trigger group.
TCB
BTW, the glock "safety" is not an operator safety (like a manual or grip safety). It is a drop safety; that's it. If it weren't there, the guns would fire if dropped muzzle up. Since it's positioned in a handy spot and technically does rely on user input, they sold it as an 'automatic' manual safety. It's no different from the trigger-operated internal firing pin block safeties in many other designs in function, but it is one of very few designs that rely on that feature alone to activate the trigger group.
TCB