When I had Nikon I tried the following lenses in that range:
20/2.8AFD, 35/2AFD, Zeiss 35/2, 50/1.8D, 50/1.8G, 50/1.4D, Zeiss 50/1.4, 20-35/2.8D, 17-35/2.8AFS.
The 17-35 is simply spectacular, better than the old 20 and 35 lenses (obviously not f/2 at 35), fast AF, sharp, nice colour and contrast. The 20 I only used in digital and it was just not good but I don't know if it is any better with film. The 20-35 I used with both film and digital and found it so-so wide open but nice from f/4. It was a bit bland though.
The Zeiss 35/2 was essentially a perfect lens, the contrast, colour and sharpness from wide open was outstanding and it matched in rendering character the Zeiss 50/1.4 (see below). My only criticism is that for a manual focus 35/2 it is quite long and heavy.
From the 50s the Zeiss was outstanding but obviously manual focus, it has a distinct character in the rendering, was stupid sharp from f/2.8 and had a nice glow effect wide open. From the AF ones the f/1.8 versions were both junk, the 50/1.4D was a very nice lens, sharp-ish even wide open but a bit low contrast wide open but stop down to f/2-2.2 and it was great.
Since money is not an issue note that there are a bunch of new lenses out nowadays from Nikon like the 20/1.8G, 28/1.8G, 35/1.4G and some zooms which would probably be a lot sharper than all these older lenses. So unless you want something with a bit more character (eg Zeiss) then these would give you excellent sharpness and colour with AF but that's all from what I read, never used these myself.
If I was buying myself with an F6 I'd go 17-35AFS, Zeiss 35/2 and Zeiss 50/1.4. Or maybe swap the 17-35 for the newer 16-35/4 VR.
If I was buying manual focus (eg an FM2n or similar), I'd go Zeiss 28/2, 35/2 and 50/1.4.