The Air Transat that had to glide 65 nm to Lajes(Azores) after fuel exhaustion did about an 11:1 ratio (from 34,500 feet) but also arrived high and fast and had to do 360s to lose altitude before final approach. 200 kt final approach speed and around 2000 fpm descent from the published reports.
Airbus 330, so in between 73 and 74 in size/weight - although obviously "light" in that the fuel tanks were empty.
