I have someone who could beat Trigon....*grins*

Name: Sparda
Nickname: Legendary Dark Knight
Age: ??
Gender: Male
Abilities: the true nature of his abilities are unknown, but he was able to single-handedly defeat Mundus and his undead armies, along with sealing away the entire demon realm using his own blood and the blood of a pure maiden, so his powers are definitely at least god-like, if not more-so. 
Species: Demon
Appearance(s): human form: [img=http://fc02.deviantart.net/fs70/i/2013/027/c/d/sparda_aura_by_the_bone_snatcher-d5svv9s.png]
Demon Form: [img=http://img1.wikia.nocookie.net/__cb20130419232556/p__/protagonist/images/f/f5/Dark_Knight_Sparda.png]
From: Devil May Cry lore
Other: he uses both the Yamato and the Sparda sword, along with his custom-made pistols, Luce and Ombra