hehe, that question never gets old. Brace yourself for half a bible's worth of very specific advice and idle speculation.
But, my two cents: All cards should be plenty fast for DOS games. It's a socket 7, after all.
The Gona list mentioned before sure is helpful if you have some specific games in mind.
Now, including Win98 in your plans extends the question by about 3.7 gazillion times, as much more demanding tasks come into play. Like, 3D.
But, none of your cards are worth mentioning in that regard. So it rather boils down to a 2D choice.
Some ATI rage had early mpeg decoding support, which is only a nice gimmick for VCDs or maybe DVDs, but was new at the time and deserves an honorable mention.
I personally like the Matrox cards, they used to be rather elite 2D cards in 1995 and were known for an absolute stellar analogue VGA signal. So, in case you're using a CRT monitor, those are the way to go.
Also, imho, their Windows driver equipment and options is something to behold - make sure you install the full version with utilities, there's bound to be a CD image available.
Their DOS performance had few rivals, as well.
So, probably a pretty good companion for a Voodoo2.
AFAIK, many people used a contemporary AGP card with super socket 7 systems but paired that with a PCI Voodoo2 to have good 3D performance.