I cannot think of a single lens in my accretion of gear that is unsharp. This includes large format lenses from the century before last to the 1980s, fixed lenses on 35mm rf cameras, fixed lenses on other than 35, about 20 or so 50-55mm standards for several slr and rf mounts, plus my outfit of Nikkors from 20 to 135mm. Even the 35 to 70 zooms on a pair of plastic Pentax IQ Zooms are decent, as is the Minolta beercan zoom that came with a Maxxum 7000.
Standouts: Nikkor H 50 f:2, compared to the 50 f:1.4 and f:1.2 the -H was better wide open than either of the faster lenses at f:2, vary slight bbl. distortion, the only Nikkor 50s I use.
Leitz Summitar, stunning center sharpness and nice contrast, field curves towards the lens, no perceptible distortion. Takumar 55 f:1.8, 55 f:2 - same lens, the f:2 has a restricted aperture: great lenses, very very sharp, nice contast, as good as any and embarassingly cheap usually with some version of a Spotmatic as a rear cap. Nikkors 105 (Sonnar), 28 f:3.5, two more favorites. 55 f:3.5 Micro Nikkor, best close up, more than adequate at infinity. 85mm f:2 Jupiter 9, typical Sonnar glow with a crisp core wide open, sharp with nice contrast at f:4 and smaller. I can go on and on.
Use any of these at f:11 and you won't be able to tell them apart.
You won't get the best of any lens unless it's on a tripod; most any decent lens can out-resolve most any common film. A lens shade even on multicoated lenses will improve contrast. A slow shutter speed will soften any lens.