I haven't flown the small ones, but the 747 is relatively easy to handle in gusty crosswinds, with the Classic being more controllable than the -400.
One trap I've fallen into several times is putting in a final correction for landing (combination of track correction, wing down, and top rudder) too soon. With a low-level wind shear, setting up for conditions at 200-300' may put all that inertia on the wrong vector when the wind changes at 50-100'. I've found that "kicking out" a good portion of the crab angle just before (or during) the flare makes for more precise placement on the centerline. Having the ailerons moving (not just set) into the wind at touchdown also helps counter the inevitable upwind wing-up movement.