55G Stocking Question

[Dpayton11]

Just wondering if this would be a good stocking plan as far as aggression issues and overstocking.

I have a 55g with a aqueon quietflow 55 and fluval u4 underwater filter.

This is what I already have:
11 harlequin rasbora
8 peppered cory
1 albino bristlenose plec
1 juvenile koi angelfish

I'm wanting to add 5-6 Boesemani Rainbow fish and possibly 1 bolivian ram to complete my tank. I'm worried about the size of the rainbows though and if they will be aggressive towards my angel.

What do you guys think?

 

[Axyadbad]

You could probably add the bolivian ram maybe a pair. But the rainbow fish would be far too much from what I've read. A decent group needs over a 100 gallons I think. 
 
I'm sure more experienced members on here could say whether I'm correct or not