For some reason I think Alter Code F actually dropped itself down for me even though it's the remake of 1. Maybe it was the frustration. Remaking one of my favorite games, but they simply use a lot of what they had for Wild Arms 3 in terms of visual so the game looks dated on its release date. Plus the facial expressions kind of bothered me and killed the mood of certain scenes. I did like some story additions though.
I'd probably say 1, 2, 5, ACF, 3, 4. Though do agree Raquel was a great character.