Hi guys , i feel your pain, i have some older videos on my youtube channel ref character rigs between blender and ue4, unfortuneately i haven’t had time to do a workflow with the latest UE4 Rig (A-pose)
the videos cover the rigify rig and the older makehuman rig these video are a year older, if needed i can redo some of it.
the best option atm would be to use a normal made blender rig and then in engine re-target the free anims