There are way more powerful digimon, ya know...

My all-time favorites (all of which can wipe the floor with Yu-gi-oh's ass):

First and second season:

Magnamon
Blackwargreymon
Skullgreymon (this guy just pwns in his level of power)
Etemon is sorta cool
Myotismon (yeah, his vampire form kicks major ass)
Patamon (and all his forms)

Third season:

Renamon, and all her forms
Beezlebumon (the guy getting blasted in my sig, hes pretty powerful actually)

Fourth season:

Wolfmon
Agunimon
Lucemon (mean ass guy, reminds me of Myotismon)
Susalumon