A really dumb idea
Two things I noticed that let you do something stupid and impractical when combined are:
1. when wild shaped as a druid you can use any non-spellcasting class features you have
2. the battlemaster fighter Pushing Attack and Trip Attack maneuvers require the target to be large or smaller *no matter what size you are*
When you combine this in a druid/fighter multiclass you can wild shape into something tiny like a spider, then shove around and trip large creatures.
This has no practical purpose and is a dumb idea, but the idea of a spider suplexing an ogre onto the ground is hilarious.