Face replacement. Plugin or Ai?

Hey All,

Looking for some advice on an upcoming project.

The plan is to shoot an actor talking to the camera then replace the head / face with a historic figure.
I'm assuming the actor will not be moving much, so a simple head track.
All probably in HD upscaling to 4k.

Can anyone recommend a good plugin to use or is Ai ready? Any recommendations here too?
I suppose Cinema4d could also be used for face replacement too.

Thanks!