V3s are the most compatible voodoos. But the general trick for voodoo compatibility is voodoo environmental variables and the version of the glide.ovl file. So generally a voodoo 3 for example can just run the Glide2x.ovl and then you are going to do Voodoo2 environmental variables and the game will treat it like a voodoo 2. There are probably only a couple games that only work with voodoo 2s though and they are windows games that are hard coded for voodoo 2.
Voodoo 3s can also run the few games that work only with banshees for example resident evil 2.
Voodoo2s can generally work with almost all games that are for voodoo1 with very few exceptions.
The exceptions are statically linked games that only work with voodoo 1s and there are only a few, and this is the only reason to ever use a voodoo 1 Example is a game like Dreams to Reality. However Voodoo 3s have less compatibility issues with voodoo 1 games than voodoo 2s, if that makes any sense.
Lastly if you intend to run V2 SLI keep in mind that even with two voodoos in SLI a voodoo 3 3500 is still faster can do higher res and doesn't have screen tearing.
TLDR: Voodoo 3s are the best
Voodoo 2 SLI though can be awesome when paired with a capable 2d/3d card like a Nvidia Geforce 2-3-4 Then you get the best of all worlds in retro gaming and you look cool while doing it.