Like others have said, "depends". Depends on your style and requirements.
I took a Leica X-1 through Europe a few months ago, fixed 24mm (so "effective" 35mm) and wondered if I would find it too limiting. Quite the opposite, nothing else to carry, just the camera with fixed lens. Yes, I missed a few shots, but the others were all there, and I possibly got more because I wasn't faffing around switching lenses, or trying to decide.
So, when my A7R arrived, the only lens I got was the 35/2.8. Yes, I have tried the CV25mm and the Canon 50mm f1.2, plus an R 100/4 macro, but in reality, the 35/2.8 lives on the front.
Like Jim, I feel 35 and 75 would be all I needed. Hopefully there will be an FE72 soon?
So, my suggestion: FE35.
Gary