I use F70 from time to time, despite it is an odd Nikon with nonstandard user interface. I am always surprised how big and bright F70 viewfinder is. So I looked, and it seems that F70 has biggest viewfinder magnification in auto focus Nikon line? F70 has 0.78x magnification with 50mm on infinity, and F6 only 0.74x, F801, F80, F100 ... all that I have checked have smaller magnification than F70. Only Nikons that I know that have bigger magnification are non HP Nikon F3 with 0.8x, F and F2.
Nikon and most others (except Pentax) took the smaller magnification route starting with the original F. Generally all autofocus cameras have even smaller magnification viewfinders.