Look at the Zeiss ZM 35mm f/2 or f/2.8. They are wonderful lenses. The 2.8 is said to be even better than the 2.0 and it is smaller and cheaper.
Not sure how the 2.0 compares to the older Summicron in terms of rendering but it is for sure a ton of lens for the money. The rendering is probably more „modern“. It compares well with modern summicrons im term of sharpness, distortion etc. The 2.8 has even better optical qualities at the expense of 1 stop.
A lens i would like to try is the Voigtlander 35 1.4 - i haven’t yet, so i can’t comment, but it could be interesting to you. Seems like a modern, cheaper „early Summilux“ remake. They recently announced a version 2 which supposedly corrects focus shift.