Thanks for explaining your methodology. By the way, Descent 3 offers a timedemo, look it up! As far as the CRT goes, yeah you are right and it is relateable to a lot of people, since that resolution is pretty common for 15"-17" CRTs. I think you have a point on AF, especially when you're checking on so many cards like you did, but I think it's important to show these things off when doing smaller benches, as they could make a huge difference.
Here are some other suggestions for games that I use sometimes, perhaps you'll like some of them:
MDK2 - OpenGL Action game released in 2000, even the demo has the built-in timedemo. It's pretty cool, if mostly CPU limited, but it can get a bit more demanding in higher resolutions and 32bit depth.
Forsaken - Classic D3D 6DOF Action game from 1998, very light-weight, it can do 60FPS even on a single Voodoo2. Probably best kept for older cards. Has two timedemos, the Nuke demo is the one that's mostly used AFAIK.
Turok 2 - D3D/Glide FPS ported from the N64, offering a pretty long timedemo. Can be pretty demanding even on later hardware. Still a little unsure of the results I've seen but definitely worth a consideration. Avoid the first title, as it has performance issues above 30FPS, so it doesn't really make for a strong case.
Dethkarz - D3D/Glide Arcade style Racing game from 1999 if I'm not mistaken. Very fun title, it has a separate shortcut for a timedemo, called Performance Test. Looks great and offers a ton of tweaking in the options menu, which can be a little daunting. Great stuff and great scaling for later systems to the point of (very) diminishing returns.
Incoming - D3D Arcade Shooter from 98(?). Very popular benchmark, the demo includes it as well. One of the most prominent games of the era to expose visual artifacts and hardware omissions for a lot of early 3D cards.
Breakneck : N.I.C.E. 2 - D3D (maybe Glide as well? I forget) Racing game from 1998. A lot less impressive compared to Dethkarz, but I thought I should mention it since it offers a nice built-in benchmark. Have not messed too much with it though.
Hope this helps!