Only experience in F (likely too spoiled now).

My ranking from my personal experience - around 20-30 longhaul F flights per year - and yes, it depends very much on the crew, the airport etc:

CX (good seats, good food, good service, great lounges, but a bit unflexible with problems with reservations and not very helpful there)

SR (not yet member: nice seats, roomy, very friendly service, food usually good to very good)

QF (seats on a 747 a little small, food ok, very nice and conststent service, ok lounges)

BA (similar seats as QF, but a little different layout, food ok, service inconsistent between good and unattentive)

LA (seats are flat, but old style, friendly service, ok food, ok lounges

AA (flagship suites are good, other seats ok. Food ok to bad, service good to plainly horrible, lounges ok to less than ok - the least consistent experience)

- tie with -

IB (similar seats as LA, friendly but amateurish service, lounges ok)