777-200. Between the seat capacity and fuel consumption, its clear the 777 is better. Depending on the engine configuration, the 777-200 also beats the MD-11 in runway length.
The 767s are good, but only if there isn't enough demand. Similarily to the 777, it has a better fuel consumption.
If you're an airbus fan sure an A330 can work too lol, just the price is going to be higher for that