Michael Corleone from The Godfather is a better young Darth Vader then the actual young Darth Vader.
The Prequels miss so much of the nuance that made Vader so great in the OT. His sadistic humor, his boldness, his cold, domineering presence, how calculating he was. In the Prequels, he’s a hot-head that flies off the handle. OT Vader got mad, but he wielded it like a blunt weapon. OT Vader is like Michael Corleone, but PT Anakin is like Sonny Corleone (at least in terms of temper; Sonny was never intolerably whiny). And that doesn’t mix. They’re two different characters.
I posted elsewhere that when writing the PT George Lucas should have used Michael Corleone as the basis for young Anakin Skywalker.