Ok, no fisheye. So take the Zeiss Touit 12mm, or the Fuji 14mm, or the 16mm - they are all excellent. I have settled for the Zeiss and the 16mm, but the 14mm is an excellent lens in between. Take this lens, if you are shooting architecture. But try the sometimes loose focus ring of the 14mm before you buy. I have never had the Samyang 12mm. I'm not a fan of the 10-24mm. Try the later for a day or two, to see of it works for you.Some users seem to have an issue with CA on the 16-55mm f2.8. Mine is excellent, though.
The problem with Fuji nowadays is, that you have too many excellent lenses to choose from. My current line-up is 8mm Samyang, 12mm Touit, 16mm, 23mm, 27mm, 56mm, 90mm, 16-55mm, 55-200mm, 100-400mm. Too many lenses by far. I have owned the 14mm, 18-55mm, 32mm Touit, 35mm f1.4, 50-140mm, 10-24mm. I am thinking of selling the excellent 55-200mm (overlap with other lenses) and a prime (16, or 23, or 56) or the 16-55mm, but I'll keep them as long as I am undecided.
See some pics at: https://www.flickr.com/photos/votec/
For further imformation on Fuji lenses see: http://www.photozone.de/fuji_x
And http://www.prophotonut.com/2015/04/30/zoom-or-prime-lenses-for-portraits-with-fuji-x/
Dieter