I can't comment on other types of commercial airliners, but on the Airbus 319/20/21 series, rudder is only to be used in the following circumstances:
On take-off roll to maintain centreline
On landing to align a/c with runway in the flare
In single engine flight with autopilot disengaged - no auto trim
Rudder should not be used in wake turbulence encounters for this type of a/c.