TP
747-400 is "THE" only airplane that is capable of doing long haul flight without any restrictions.
I am sure 777-300ER can do SYD or MEL with only few restrictions as 777-200ER in SQ does TPE-LAX regularly without any payload restrictions even on a most unfavorable conditions from LAX-TPE which on a certain day can be 14.5 hours across Pacific.