1) Iron Man VS Thor

2) Hulk VS Thor

3) Iron Man VS Hulk

4) Iron Man VS Captain America

5) Hulk VS Thor

So far Hulk has been obeyed Captain America in MCU despite the only version of them not being enemies. However, the other versions of them used to be enemies while the upcoming movie for 2025 shows that they are technically enemies but it’s actually Thunderbolt Ross VS Sam Wilson instead.