Can I give 3DFX a -vote? 3DFX was not the start of the 3Dcard market
As much as I like the Kyro I would have to vote for either the ATI 9700pro or GTX8800 both of which gave a massive jump over older generations and both lasted ages.
Although it wasn't the start of the 3d market, it was the best implemented and taken up en mass which then brought more and more 3d games out. Lets look at the previous 3d cards to the voodoo shall we?
S3 ViRGE - performance so bad that people with highend cpu's could do better using the cpu which lead to the card being unaffectionate dubbed the first 3D decelerator.
ATI Rage 3D - Again, a very very poor performing card and didn't sell well.
Rendition Verite 1000 - Now this should have been the great launch of 3d gaming and in fact Quake was expected to shine on it
Carmack stated "Verite will be the premier platform for Quake
.Poor 2D performance proved problematic for the board, as did programming for the Verite. It was the latter which Carmack would later say led to iD's decision to move away from proprietary APIs to OpenGL. This card was launched at about the same time as the voodoo 1.
So that brings us nicely to the Voodoo1. A great performing 3d only card which meant you could have a decent 2d card of your choice in your pc with the voodoo1 handling just the 3d. This brought 3d gaming to the masses and sold by the bucket load. Once Quake went to OpenGL it was game over for the poorer performing and image quality 3d cards.
Riva 128 was almost a year after the voodoo1 and image quality wasn't a patch on the voodoo 1. ATI Rage pro came out but was disappointing and didn't sell hardly at all. I could list lots more cards in 1997 and 1998 which were failures due to dodgy driver support or bad design so the voodoo 1 and 2 reigned supreme for 2 or 3 years.
So which are these fantastic 3d cards which were better than the voodoo1 in 1997 as I can't remember them (I am getting old now though

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ANyway the OP's question is more successful euthiasiast card and none of the competition to the voodoo can fall into the category as they weren't successful.