I had 3 Angel fish and found out 2 had paired off and were bullying the 3rd. Last week I found out why as the 2 that paired off and bullied the 3rd laid eggs. My Black angel died last week after a day of not eating and hanging in corner and I am sure it was due to being bullied and lonelieness. The eggs are all gone and did not hatch.
The Pair that are mates are doing just fine my question is:

I wanted to add a few more Angel's can I do this without worrying about the paired ones bullying the new ones ?
Can I add 2 baby angels instead of med/large or should I stick with the same size I currently have med/large ?

My current Fish load is as follows:

6 Corodoras
2 Clown Loachs
2 Angel Fish ( Paired up ) male & female Med/Large

My Aquarium setup is as follows:
65 Gallon Tank
Rena XP3 Canister & Marineland Magnum 350 Canister. ( Canisters are running in Tandom )

I really want a few more Angels but not sure If I can safely add them ?

i would suggest not, once angels have paired off they can be very territorial and aggressive, your pair have just shown this behaviour with the result being the death of another fish. i think if you put more in (especially if you put smaller ones in) you're gonna have the same thing happening.