If I go by my kids (we haven't seen Homecoming), who can watch any of those movies again and again (my kids range from 7 to 20) the list goes:
Iron Man (by far)
Avengers
CA: First Avenger
Thor/Ant-Man
Dr. Strange

CA: WS, CA: CW and Avengers: AoU they watched twice and not since once, everything else once and don't want to see again. I agree with them (we save movies and if they want to watch them again and again, such is life).