In older game worlds, the DC-9-30 can fly 2,400+ miles without weight restrictions. It's sort of like the A319LR of the 70s/80s. In the past I've been running DC-9-30s on routes like MIA-BUR, BOS-FAT, TPA-BOG, and CLT-SBA.
757-200/200M/300 are pretty good aircraft to have.
767-200ER for long haul. Lower capacity, but super long range.