BA @ LGW
777 - 3 class: Loads: 40J, 24W and 216M - 10 crew (1 cm, 1 prsr, 8 mc)
777 - 4 class: Loads: 14F, 48J, 40W and 124M - 11 crew (1cm, 1 prsr, 9 mc)
I may be a few seats out on the 4 class config in W/M as I haven't been on it for a long time, but you'll get the gist of it.
On 737 it's anything between 5 and 3 crew, although mostly 3 crew.
HTH,
Gg