Bingowings said:
but that doesn't have any impact on his idea.

Nope; sorry; it does.

Also everyone seems to remember Anakin as a great hero not the child murdering scumbag he actually is.

That's because no one in the rebellion knows?

My solution is this:

[...]

When Luke questions him about it he can truthfully say that Anakin was a great jedi and a great friend.

No, because in his rewrite, Anakin still falls to the dark side and duels against Ben... and becomes Darth Vader... in secret... just like in the actual storyline.

Anakin is still remembered as a great hero by the general public. Only Ben knows the truth that Vader is Anakin.

Yes, that's the actual storyline of the movie.

See it now?