Howard Dean, Joe Lieberman and Wesley Clark.
John Kerry, polling in the single digits, could easily have been described as an "also ran".
(Dean had a 9 point lead on his closest rival)
Update: Looks like kos was thinking along the same lines. At this point 4 years ago the rankings were:
Joe Lieberman, Richard Gephardt and John Kerry
How many of you remembered that Gephardt was even in the race?