You overlooked the Fearsome Five
Lesse, the demon's three are very strong if you don't have a way to banish them.
The two Four teams aren't all that strong without prep.
The Fatal Five are, of course, crazy powerful.
Sinister Six, not too strong.
The Seven Soldiers of Victory are mostly pretty weak, but Klarion with the Croatoan/Father Box is pretty powerful, and of course they have Zatanna at some of the best she's ever been.
The Great Ten is the largest team and does have Thundermind, a powerful herald-level type, as well as plenty of nice metas.
I'd say... Fatal Five kills everyone else pretty handily, but it's hard to tell beyond that.
