I think most of those have few or no OS flashes, I'm not totally sure so I can test. However I do have some suggestions:
Robocop 3 has extreme os flashing, though extensive cd32 joypad mapping would be required for a proper release.
Some soccer games have extreme flashing, particularly Kick Off 2 series and Goal. I think Total Football doesn't work at all. SWOS would be great (using jst version on cd32 as whdload version doesn't fit in 2mb RAM). Unfortunately of course they all support saving and could do with expanded control support.
Flashback has some minor flashing but certainly is a good/beautiful game.