For testing, I picked ST:TNG Unity by Spectrum Holobyte. It is about 600MB and was one of the "last DOS games" (even in its README.TXT, they had last minute How-To added explaining that Win95 hadn't been released yet, but they had suggestions how it might be configured to work under Win95). And also, it's a game I never played before, so interested to see how it plays on this 386DX-33.
However, as it turns out, ST:TNG Unity requires a math coprocessor! I do have one, but it is only 20MHz and caused stability issues with this 386DX-33. I have another 33MHz coprocessor on order, will be a few days. Quake also requires a co-processor, so we'll see how it handles also (and it took forever to install that across the SDLPT device). Any other pre-DirectX large-DOS games to suggest? Something with BG music and FX. I guess WC4 was still MS-DOS in 1996, I'll see if that requires a co-processor as well. But dialing back a couple years, lots of good stuff in '94 (Warcraft, SystemShock, XCOM, Elder Scrolls, XWing/TieFighter).
But at least I can confirm ST:TNG Unity was installable from a CD-R that I just burned today, using that SBIDE.SYS driver that we just figured out how to setup for that original 1997 Creative 24X CD-ROM 😀