I would say Nearly Departed because for the most part; Natural Silvers can carry better in Gold PFs than natural bronzes. Also in my opinion; Nearly Departed's SA is far more useful than the other 2.
Stage Fright relies on dealing enough damage to get a foe to 25% health when your damage output as a bronze isn't great. The other part of the SA forces your *assumingly* carry Squigly to die and inflict the DOOM debuff.
Scared Stiff could be interesting, but right now damage is more important to maintain streaks, rather than survival. On a defense team it could be cool, but the low FS won't allow your team to show up at 15+ streaks and there are other characters that do that job much better.