Is this even in the same league with Yellowstone?
Yeah, but still quite a bit smaller.
The largest known explosive eruption was the La Garita Caldera in Colorado 28 million years ago - about 5,000 cubic kilometers of material.
Toba is second with 2,800 cubic km.
The largest of the Yellowstone eruptions (the one three eruptions ago, 2 million years ago) is 4th with 2,500 cu km.
The last Yellowstone eruption 640,000 years ago was about 1000 cubic km of stuff - the largest Taupo eruption was 500 cubic km.
Taupo seems to erupt a lot more often than Yellowstone though.
Taupo is the lake that formed in its crater, larger than Lake Tahoe (616 square km, as compared to 500). It was a rhyolite eruption, one of the largest to have ever take place, and would have changed the weather for at least decades.