The comics could have been better, so let's give the movie versions a try. There's alot so you can pick and choose or comment on all.
Apocalypse/Jean(Young) vs Captain Marvel
Jean Grey(Old) vs Wanda
Barakapool/Blink/Sebastian Shaw vs Thor(first solo movie)
Composite Juggernaut/Collossus vs Hulk
Magneto(Young) vs Vision
Composite Cyclops/Nightcrawler vs Iron Man(first solo movie)
Composite Wolverine/Sabertooth vs Cap and Bucky
Psylocke/Lady Deathstrike vs Black Panther/Okoye/Shuri
Composite Mystique vs Black Widow