The problem is that you put two small angels in with larger angels.
The best thing you can do is add more cover and feed the larger ones, and hope they settle their territory and then leave the smaller ones alone.
It's very tough to put them in together. As a type of cichlid, angel fish can be territorial towards their own kind, especially if smaller ones are introduced to larger ones territory.
I'd just see if you can wait it out. Do a water change to potentially freak the fish out a bit so they don't think to bother the small ones, and try feeding them to keep them full and disinterested as well as adding ornaments to break their line of sight.
Also, adding some smaller dither fish such as tetras to add more movement could benefit you, it gives them more to interact with then just other angels.
Then just hope they get use to them and leave them be.