I could honestly go on and on but I'll say some that came to my mind right now:
Dragon Ball - Maijn Vegeta vs Goku or Jiren vs Goku
One Piece - Luffy vs Katakuri
Naruto - Naruto vs Pain
Bleach - Ichigo vs Ulquiorra or Ichigo vs Byakuya
Fullmetal Alchemist - The whole fight against Father
Berserk - Guts & Zodd vs Ganishka
Kimetsu no Yaiba - Tanjiro vs Muzan
My hero academia - Midoriya vs Overhaul or All Might vs All for One
Black Clover - The whole battle against the word devil
JoJo's Bizarre Adventure - Johnny & Gyro vs Funny Valentine or Josuke vs Kira