Look if you want to be completely subjective about the topic then hes of course the best visual (are there any non-visual directors in the film industry by the way?
) director for you, end of discussion.
But on a more objective turf thats more than debatable and concerning his last 10-12 films its not really debatable (maybe with the exception of Gladiator).
Again, that he is among the best is debatable in my opinion. Hes an outstanding "visual" director, no doubt, its just that Barry Lyndon is not a film by R. Scott (marvelously emulated by him though).