Checking out Morph3d.
You can get this as a stand alone program. Not just for Unity.
Has anyone tried this yet?
It looks good and is reasonably priced, but if it doesn’t work with Unreal why bother.
Blender works with UE4, is free and has shape keys.
I have blender. I’ll admit it is pretty good, if you have the talent for modeling.
There are a lot of us that can get by making basic meshes that look good in a game.
But making a realistic looking character is way beyond our abilities at this time.
Otherwise programs like Fuse, Makehuman, Poser, and Daz wouldn’t be so popular.
Also, you have ZBrush. You have cool free demo char with the app. You could use them for your project 