Lenses are, for the most part, designed to do specific things. No lens will perform "the best" in all situations. Photographing something flat and don't want distortion? Use a dialyte (Artar, Ronar) or plasmat (G-Claron, Fujinon-A) designed for reproduction work. Want something with a fast aperture? Use a planar (Xenotar, Planar). Landscapes? Try a general-purpose plasmat (Sironar, Symmar, Fujinon-W) or maybe a tessar (Xenar, Nikon-M). Anyhow, as mentioned before nearly all modern lenses will be diffraction-limited by or before f22.
There are no silver bullets here, so don't listen to anyone who offers to sell you one.