My absolute favorite is my old Marlin M39A. It has a Williams aperture sight and small flat faced gold bead front. It's slim, light, accurate and handles perfectly.
How old are you since you’re using open sights?
59... I don't need glasses yet. Feel fortunate for that. I'm still able to kill them with my S&W K22 or Ruger MK III Hunter open sights handguns.
Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats.