The Sachs Elan 12-speed hub. 3.4 kg for just the hub, crazy complex internal layout, quality issues, and a 339% range (although looking at the ratios, they really did get the whole progressively closer ratio steps idea right, most hubs don't do that).

And then the Rohloff came out, at 14 speeds, 1.82 kg for everything, absolutely bombproof, and a 526% range.