Oracle, right type mix, wrong numbers.
I reckon GB is closer with the number of 744s and the later versions (before the ERs) aren't that old.
777/787- not enough airframes in your mix. 50 isn't enough for what I reckon we'll need them to do. Replace the 17 A330s, 25(ish) 767s, a similar number bunch of 744s and expand the business as well? That needs a few more than 50 airframes.