I use DosBox-SVN-Daun to play DOS games with a CRT shader. There's still scanlines but they're thinner than the RetroArch shaders so they still look like a VGA monitor.
Thanks for the scr$. But the scanlines still look a bit too fat for me, though this is getting into "personal preference' zone.
But, to take it even further, there's lots of people saying that there were actually no scanlines at all on VGA monitors, at least not from that particular era (say, late Eighties to mid Nineties). I think they may be correct. Check that reddit thread Ilinked to, I also heard it on Vogons before.
Even so, I would still like to see some actual, decent quality photos (it's a bit shocking none exist) and will probably use scanlines even if there weren't any originally. For two reason: one, I always disliked the raw computer-monitor look...especially when comparing my Amiga on a TV to my mate's 386 VGA back in the day. This is after all one of the big reasons we use advanced GPUs...to get rid of jaggies. And two, the DOS era games were made mainly for 14-15" monitors. When I display them full-screen on bigger sized modern screens they look awful. Scanlines help with that but not the thicc sort which looks good on arcade/console games. Here's my little comparison gallery: https://postimg.cc/gallery/u6jnde4s/