Jupiter 9 (85mm f/2.0).
The caveat being that, like with all Soviet made lenses (the optical scheme is actually a Zeiss Sonnar designed in the 1930's), you need to get hold of a healthy and properly collimated sample.
There is a rumour going around that they will not focus properly throughout their range on Leica M bodies. I can only say that mine, used on an M6 (M39 to M adapter needed BTW), focuses accurately both near and far, even at full aperture.
Drawing is very nice: somewhat soft at full aprture, sharp and glowing beyond.