Hotnhigh,
My comment included the phrase “very few”. I did not wish to imply that there are NO mainline carriers operating heavy cargo aircraft.
I also included the phrase “western”. Perhaps you are unaware that neither EK nor CX belong to western countries.
Furthermore, are you aware that EK do not operate any cargo aircraft and that most cargo carried by CX is carried by Cathay Pacific Cargo, a separate company?
They are not examples of airlines in-sourcing the carriage of cargo.