How about a bi- monthly list of the top ( good) thirty Airlines.
The ranking should not be determined by the Airlines themselves of course.
A survey of pilots that gives an indication of
1/ Total block hours for the month
2/ Total duty hours for the month
3/ Number of duties beginning before 6am local for the month
4/ Number of duties finishing after midnight local ( at home base)for the month
and importantly
5/ number of circadian shifts for the month ( earlies into lates and back again)