Will what be forgettable?
The only one of those shows I'm not familiar with is '84 Cadets. Sorry. I am "youngin'" and my knowledge base is a bit sketchy pre-1995. Even though it's only 2 years old, Phantom '08 is the most intense drum corps experience I've ever had. I was through the roof with that show and I was on Staff for BDB that year. Legend implies age, but I have no doubt it will be remembered as one of the all time greats.
I would add:
1996 Phantom (Defiant Heart)
1995 Scouts (Drum Corps Fan's Dream? I was never clear on whether or not that was really the name of the show)
2002 Cavaliers (Frameworks)