Great art there! Wow! That's how I imagine Anakin at the "end of his life" right prior to dawning the Vader armour. My only point of criticism is that maybe he looks a BIT too old in that picture. I guess I would have him with a bit more hair and a bit thinned out I guess. But that depiction is still very close to how he SHOULD have looked right before his fateful duel with Kenobi and his Fall.

When we first see Anakin, YES, he should look like Mark Hamil in that picture except a tad more muscular, a bit taller, and with darker hair and a bit more masculinized face. But yeah I would have him dressed like Mark in that picture, and then adopting a uniform that is a cross between the ROTJ Luke garb and the suit he wears as Vader (which you kind of have Anakin wearing a prototype of in your brilliant sketch).