Other bodies may advise differently but I will answer for the FAA.
The FAA covers this in their wake turbulence handbook as well as many other scenarios you can look over.
Basically you can fly above the glide slope as you have assumed but you should always take precaution as it cant be known if the leading aircraft is at or above slope.
As in similar situations, separation services may be provided, load permitting.
220.127.116.11 Air Traffic Control Assist
Air traffic controllers are able to provide sepa- ration distance
information to pilots when workload permits and they have radar
dis- plays in the control tower. They can provide airspeed
differential between aircraft and may advise pilots following another
aircraft when they are overtaking the preceding aircraft.
The document outlines some other methods and is worth a read.