Shanks' aura in One Piece is unmatchable and his powers are so powerful that many pirates and marines can’t even touch him for fight.
Meruem of Hunter X Hunter has some of the most powerful moves in the anime and has authoritative royalty as the chimera ant king whose aura makes him untouchable.
Gilgamesh’s powers and aggression make him untouchable, his self belief as a god and majestic aura powers make him one of the unbeatable characters.
Bleach’s Sosuke Aizen has manipulative powers and he is one of the intelligent characters, his mysterious moves makes him untouchable.
Sukuna is king of curses in Jujutsu Kaisen and his terror dominance in the anime make his aura and fighting power ability untouchable.
Girono Giovanna has an unmatchable aura of authority and ambition which make his character respected and fearful to even touch.
Gouki Shibukawa of Baki has decades of experience in Aiki - jutsu which makes his powerful aura untouchable and unbeatable.