My recommendation depends on where you're willing to make compromises. If F-class is more important to you than hunting, the I recommend you go with the least expensive model that provides the features you like.
Optical performance is not a big discriminator here - these three scopes are pretty close in terms of resolution. Atmospheric turbulence - not optical performance - will limit optical resolution (and contrast) under typical firing range conditions.
Like many folks, you'll probably end up with the Sightron or Vortex. They both offer great value.
If hunting is more important, however, then you should place a higher priority on optical performance. Glare performance, in particular, is very important for long range hunting because it often limits image contrast at critical times around dawn and dusk.
I've assessed the glare performance of all three scopes you listed at the last few SHOT Shows. There are big differences between these models. The Sightron has the worse glare performance - it is well below average for that price point. The Vortex is better, but still slightly below average. One reason glare is worse in these models may be that the mag range goes up to 24X. Glare at all powers gets worse as the mag range increases. You don't need magnification higher than 20X for big game hunting.
The Zeiss has above average glare performance. For hunting, I would sacrifice features here and there to have that optical quality at dawn and dusk.