1999 Vanguard doesn't qualify. They won every show but one prior to Championships week, before scrambling to catch up to a Blue Devils squad they were beating handily at the start of the season. But neither Vanguard nor BD finished outside of the Top 2 at any show that season.
Even 1987 Cadets is a little misleading. Yes, Spirit beat them three times that year... but the only other corps to beat the Cadets in 1987 was Vanguard! The 1987 Cadets are another corps that finished 1st or 2nd at every single show. (As others posted while I was typing this.)
As someone else said, the level of execution these corps achieve is so high it's almost impossible to go on a huge tear and pass up several of the corps at the top.
This post has been edited by hostrauser: 14 May 2012 - 12:21 PM