Make Mesh Aggregate

I’ve imported my object as many meshes.
In Unity one could make an aggregate of those meshes via a Prefab.
What does one do in Unreal Engine for this?

I want to be able to have a ship made of many parts and for a blueprint to be able to deal with this aggregate of parts.

Currently the only way to do thi in Unreal Engine is to link meshes together by a hierarchy in a skeleton.