Most airplanes, including the 737, have bank angle limits when doing a slip that would cause airplane parts to contact the runway. There are a number of charts that show different flap configurations, deck angles, and bank angle, which then show which parts will contact at what point (wing tip or winglet, engine pod, flap fairing).
Then it depends on what the SOP’s for that airline state for X wind technique, and bank angle limits.
On the 737, while it can land at X wind limit with 0 bank crab on landing, using some amount of bank will make the landing more comfortable. On the 800 the scimitar winglet would be the first surface to contact, on the 600 it would be a flap fairing usually (and at a much higher bank angle due to the shorter wing and no winglet).
All that to say I’m not sure what it is on the 747 or the A380.
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