Sneaky, non-PA build. Which non-Fixer gun is best?

I am trying to decide which gun to carry and use when I am not using The Fixer. As title says, I play a sneaky, no-PA build. Here are the guns I own, from which I am trying to decide the second gun to carry with my sneaky build. Which one of these should be my 2nd gun? (Or even my first, if you think one of these is superior to The Fixer for sneaky, non-PA build)

- Anchorage Ace

- Elder's Mark

- Whistle in the Dark

- Shattered Ground