Random Procedural Background

Probably down to being a Noob but I am trying to generate a variety of backgrounds for a Side Scroller.

The basic setup of the game is based on the Endless Runner tutorial as per Endless Runner: Spawning the Course | 02 | v4.7 Tutorial Series | Unreal Engine - YouTube. The procedure for generating the tiles is used for generating an en endless background/ ground for the player to move along, easy enough.

However, I would like for the Spawn Actor command to randomly draw from a library (Classes) of meshes so as to break the monotonous background.

Thank you,

Andre