for what it's worth: I have and use the following:
300mm f/4.5 Wollensak Velostigmat Series II
300mm f/5.6 Fujinon W
330mm f/6.8 IA Raptar
355mm f/9 G-Claron
360mm f/6.5 NIKKOR-W

All the optics are (more than) quite sharp enough for making contact 8x10 prints.

as for image contrast:
300mm f/4.5 Wollensak Velostigmat Series II: by far the least contrasty image
300mm f/5.6 Fujinon W, 355mm f/9 G-Claron, and 360mm f/6.5 NIKKOR-W: all very close with the NIKKOR barely being the most contrasty
330mm f/6.8 IA Raptar: noticeably more contrasty than all the other lenses. I believe the optic to be from the 1950s and definitely only single coated optics.

Ironically for making Platinum/Palladium contact 8x10 prints my definite choice is the (vintage) 300mm f/4.5 Wollensak Velostigmat Series II