I worked with a guy recently who used all Canon and Nikon (old) primes with his Sony, using a metabones adapter.
Zeiss Loxia - look no further. Fantastic aerial glass. Zeiss quality, tiny footprint. We had Matt Duclos put focus and iris gear rings on our Loxia glass so we can fly with a remote ff system. The rings are permanently mounted so you never have to worry about slippage.